Color issue depending on background?

[rionda]

The colors used to show the events seems to be mapped to the ones set in google for the calendar the event corresponds to, but I'm seeing an issue where only the frame of the events of one specific calendar is colored, and the interior of the event is "transparent", i.e., it just has the background color. Moreover, this changes when using set background=light vs set background=dark. The screenshots below give an idea: the event "emails" on Monday has a "transparent" interior when set background=dark, and it has a "filled" interior when set background=light. The opposite happens for the events in the other calendars (see screenshots).

So, the question is: how are the colors chosen, and what controls whether the interior of an event is filled or not?

Screenshot with background=dark

Screenshot with background=light

[itchyny]

The background and foreground are switched automatically since events with light background in dark background colorschemes looks ugly. But your screenshots look something wrong. Let me know the result of :echo join(filter(split(execute('hi'), "\n"), 'v:val =~ "Calendar"'), "\n").

[rionda]

This is the result with background=dark:

CalendarSelect xxx guibg=#1d424b                                                                                                                                                                                                                                                                                               
CalendarSunday xxx guifg=#9c1111 guibg=#957d7d                                                                                                                                                                                                                                                                                 
CalendarSaturday xxx guifg=#11119c guibg=#727d9f                                                                                                                                                                                                                                                                               
CalendarTodaySunday xxx term=bold cterm=bold gui=bold guifg=#9c1111 guibg=#957d7d                                                                                                                                                                                                                                              
CalendarTodaySaturday xxx term=bold cterm=bold gui=bold guifg=#11119c guibg=#727d9f                                                                                                                                                                                                                                            
CalendarToday  xxx term=bold cterm=bold gui=bold guifg=#096b20 guibg=#709380                                                                                                                                                                                                                                                   
CalendarDayTitle xxx guifg=#587176 guibg=#183e47                                                                                                                                                                                                                                                                               
CalendarSundayTitle xxx guifg=#9a2c2c guibg=#957d7d                                                                                                                                                                                                                                                                            
CalendarSaturdayTitle xxx guifg=#292c9c guibg=#727d9f                                                                                                                                                                                                                                                                          
CalendarOtherMonth xxx guifg=#3f5d63                                                                                                                                                                                                                                                                                           
CalendarOtherMonthSelect xxx guifg=#3f5d63 guibg=#1d424b                                                                                                                                                                                                                                                                       
CalendarNormalSpace xxx guifg=#002b36 guibg=#93a1a1                                                                                                                                                                                                                                                                            
CalendarCommentSelect xxx guifg=#586e75 guibg=#1d424b                                                                                                                                                                                                                                                                          
CalendarComment xxx links to Comment                                                                                                                                                                                                                                                                                           
Calendaramhb   xxx ctermfg=231 ctermbg=63 guifg=#ffffff guibg=#3871ff                                                                                                                                                                                                                                                          
CalendaramhbSelect xxx guifg=#ffffff guibg=#023bff                                                                                                                                                                                                                                                                             
Calendarmric   xxx ctermfg=231 ctermbg=113 guifg=#ffffff guibg=#7add39                                                                                                                                                                                                                                                         
CalendarmricSelect xxx guifg=#ffffff guibg=#44a703                                                                                                                                                                                                                                                                             
Calendarriod   xxx ctermfg=152 guifg=#9fe1e7                                                                                                                                                                                                                                                                                   
CalendarriodSelect xxx guifg=#9fe1e7 guibg=#1d424b                                                                                                                                                                                                                                                                             
Calendaramhe   xxx ctermfg=176 guifg=#cd74e6                                                                                                                                                                                                                                                                                   
CalendaramheSelect xxx guifg=#cd74e6 guibg=#1d424b                                                                                                                                                                                                                                                                             
Calendaramhf   xxx ctermfg=231 ctermbg=131 guifg=#ffffff guibg=#be6536                                                                                                                                                                                                                                                         
CalendaramhfSelect xxx guifg=#ffffff guibg=#882f00                                                                                                                                                                                                                                                                             
Calendaramhg   xxx ctermfg=203 guifg=#fa573c                                                                                                                                                                                                                                                                                   
CalendaramhgSelect xxx guifg=#fa573c guibg=#1d424b                                                                                                                                                                                                                                                                             
Calendaramhh   xxx ctermfg=231 ctermbg=203 guifg=#ffffff guibg=#ef445e                                                                                                                                                                                                                                                         
CalendaramhhSelect xxx guifg=#ffffff guibg=#b90e28 

And here is with background=light:

CalendarSelect xxx guibg=#dcdacd                                                                                                                                                                                                                                                                                               
CalendarSunday xxx guifg=#f21a1a guibg=#fabfb0                                                                                                                                                                                                                                                                                 
CalendarSaturday xxx guifg=#1a1af2 guibg=#c4bfe6                                                                                                                                                                                                                                                                               
CalendarTodaySunday xxx term=bold cterm=bold gui=bold guifg=#f21a1a guibg=#fabfb0                                                                                                                                                                                                                                              
CalendarTodaySaturday xxx term=bold cterm=bold gui=bold guifg=#1a1af2 guibg=#c4bfe6                                                                                                                                                                                                                                            
CalendarToday  xxx term=bold cterm=bold gui=bold guifg=#34b941 guibg=#cae6ba                                                                                                                                                                                                                                                   
CalendarDayTitle xxx guifg=#9aa4a1 guibg=#e1dfd0                                                                                                                                                                                                                                                                               
CalendarSundayTitle xxx guifg=#f4433f guibg=#fabfb0                                                                                                                                                                                                                                                                            
CalendarSaturdayTitle xxx guifg=#4443ef guibg=#c4bfe6                                                                                                                                                                                                                                                                          
CalendarOtherMonth xxx guifg=#b6bbb3                                                                                                                                                                                                                                                                                           
CalendarOtherMonthSelect xxx guifg=#b6bbb3 guibg=#dcdacd                                                                                                                                                                                                                                                                       
CalendarNormalSpace xxx guifg=#fdf6e3 guibg=#586e75                                                                                                                                                                                                                                                                            
CalendarCommentSelect xxx guifg=#93a1a1 guibg=#dcdacd                                                                                                                                                                                                                                                                          
CalendarComment xxx links to Comment                                                                                                                                                                                                                                                                                           
Calendaramhb   xxx ctermfg=27 guifg=#023bff                                                                                                                                                                                                                                                                                    
CalendaramhbSelect xxx guifg=#023bff guibg=#dcdacd                                                                                                                                                                                                                                                                             
Calendarmric   xxx ctermfg=70 guifg=#44a703                                                                                                                                                                                                                                                                                    
CalendarmricSelect xxx guifg=#44a703 guibg=#dcdacd                                                                                                                                                                                                                                                                             
Calendarriod   xxx ctermfg=0 ctermbg=195 guifg=#000000 guibg=#d5ffff                                                                                                                                                                                                                                                           
CalendarriodSelect xxx guifg=#000000 guibg=#9fe1e7                                                                                                                                                                                                                                                                             
Calendaramhe   xxx ctermfg=0 ctermbg=219 guifg=#000000 guibg=#ffaaff                                                                                                                                                                                                                                                           
CalendaramheSelect xxx guifg=#000000 guibg=#cd74e6                                                                                                                                                                                                                                                                             
Calendaramhf   xxx ctermfg=94 guifg=#882f00                                                                                                                                                                                                                                                                                    
CalendaramhfSelect xxx guifg=#882f00 guibg=#dcdacd                                                                                                                                                                                                                                                                             
Calendaramhg   xxx ctermfg=0 ctermbg=209 guifg=#000000 guibg=#ff8d72                                                                                                                                                                                                                                                           
CalendaramhgSelect xxx guifg=#000000 guibg=#fa573c                                                                                                                                                                                                                                                                             
Calendaramhh   xxx ctermfg=124 guifg=#b90e28                                                                                                                                                                                                                                                                                   
CalendaramhhSelect xxx guifg=#b90e28 guibg=#dcdacd                                     

[itchyny]

I fixed the implementation. I believe this should fixed the issue.

[rionda]

Thank you for working on it. Something changed, but I don't think it is right yet. Here are the screenshots with background=dark and background=light, and the outputs of the command you asked me to run.

Specifically, you'll see that with background=dark now no event has a filled interior, and with background=light, no event has any color at all.

With background=dark

CalendarSelect xxx guibg=#1d424b                                                                                                                                                                                                                                                                                               
CalendarSunday xxx guifg=#9c1111 guibg=#957d7d                                                                                                                                                                                                                                                                                 
CalendarSaturday xxx guifg=#11119c guibg=#727d9f                                                                                                                                                                                                                                                                               
CalendarTodaySunday xxx term=bold cterm=bold gui=bold guifg=#9c1111 guibg=#957d7d                                                                                                                                                                                                                                              
CalendarTodaySaturday xxx term=bold cterm=bold gui=bold guifg=#11119c guibg=#727d9f                                                                                                                                                                                                                                            
CalendarToday  xxx term=bold cterm=bold gui=bold guifg=#096b20 guibg=#709380                                                                                                                                                                                                                                                   
CalendarDayTitle xxx guifg=#587176 guibg=#183e47                                                                                                                                                                                                                                                                               
CalendarSundayTitle xxx guifg=#9a2c2c guibg=#957d7d                                                                                                                                                                                                                                                                            
CalendarSaturdayTitle xxx guifg=#292c9c guibg=#727d9f                                                                                                                                                                                                                                                                          
CalendarOtherMonth xxx guifg=#3f5d63                                                                                                                                                                                                                                                                                           
CalendarOtherMonthSelect xxx guifg=#3f5d63 guibg=#1d424b                                                                                                                                                                                                                                                                       
CalendarNormalSpace xxx guifg=#002b36 guibg=#93a1a1                                                                                                                                                                                                                                                                            
CalendarCommentSelect xxx guifg=#586e75 guibg=#1d424b                                                                                                                                                                                                                                                                          
CalendarComment xxx links to Comment                                                                                                                                                                                                                                                                                           
Calendaramhb   xxx ctermfg=27 guifg=#023bff                                                                                                                                                                                                                                                                                    
CalendaramhbSelect xxx guifg=#023bff guibg=#1d424b                                                                                                                                                                                                                                                                             
Calendarmric   xxx ctermfg=70 guifg=#44a703                                                                                                                                                                                                                                                                                    
CalendarmricSelect xxx guifg=#44a703 guibg=#1d424b                                                                                                                                                                                                                                                                             
Calendarriod   xxx ctermfg=152 guifg=#9fe1e7                                                                                                                                                                                                                                                                                   
CalendarriodSelect xxx guifg=#9fe1e7 guibg=#1d424b                                                                                                                                                                                                                                                                             
Calendaramhe   xxx ctermfg=176 guifg=#cd74e6                                                                                                                                                                                                                                                                                   
CalendaramheSelect xxx guifg=#cd74e6 guibg=#1d424b                                                                                                                                                                                                                                                                             
Calendaramhf   xxx ctermfg=94 guifg=#882f00                                                                                                                                                                                                                                                                                    
CalendaramhfSelect xxx guifg=#882f00 guibg=#1d424b                                                                                                                                                                                                                                                                             
Calendaramhg   xxx ctermfg=203 guifg=#fa573c                                                                                                                                                                                                                                                                                   
CalendaramhgSelect xxx guifg=#fa573c guibg=#1d424b                                                                                                                                                                                                                                                                             
Calendaramhh   xxx ctermfg=124 guifg=#b90e28                                                                                                                                                                                                                                                                                   
CalendaramhhSelect xxx guifg=#b90e28 guibg=#1d424b          

With background=light

CalendarSelect xxx guibg=#dcdacd                                                                                                                                                                                                                                                                                               
CalendarSunday xxx guifg=#f21a1a guibg=#fabfb0                                                                                                                                                                                                                                                                                 
CalendarSaturday xxx guifg=#1a1af2 guibg=#c4bfe6                                                                                                                                                                                                                                                                               
CalendarTodaySunday xxx term=bold cterm=bold gui=bold guifg=#f21a1a guibg=#fabfb0                                                                                                                                                                                                                                              
CalendarTodaySaturday xxx term=bold cterm=bold gui=bold guifg=#1a1af2 guibg=#c4bfe6                                                                                                                                                                                                                                            
CalendarToday  xxx term=bold cterm=bold gui=bold guifg=#34b941 guibg=#cae6ba                                                                                                                                                                                                                                                   
CalendarDayTitle xxx guifg=#9aa4a1 guibg=#e1dfd0                                                                                                                                                                                                                                                                               
CalendarSundayTitle xxx guifg=#f4433f guibg=#fabfb0                                                                                                                                                                                                                                                                            
CalendarSaturdayTitle xxx guifg=#4443ef guibg=#c4bfe6                                                                                                                                                                                                                                                                          
CalendarOtherMonth xxx guifg=#b6bbb3                                                                                                                                                                                                                                                                                           
CalendarOtherMonthSelect xxx guifg=#b6bbb3 guibg=#dcdacd                                                                                                                                                                                                                                                                       
CalendarNormalSpace xxx guifg=#fdf6e3 guibg=#586e75                                                                                                                                                                                                                                                                            
CalendarCommentSelect xxx guifg=#93a1a1 guibg=#dcdacd                                                                                                                                                                                                                                                                          
CalendarComment xxx links to Comment                                                                                                                                                                                                                                                                                           
Calendaramhb   xxx ctermfg=60 ctermbg=63 guifg=#586e75 guibg=#3871ff                                                                                                                                                                                                                                                           
CalendaramhbSelect xxx guifg=#586e75 guibg=#023bff                                                                                                                                                                                                                                                                             
Calendarmric   xxx ctermfg=60 ctermbg=113 guifg=#586e75 guibg=#7add39                                                                                                                                                                                                                                                          
CalendarmricSelect xxx guifg=#586e75 guibg=#44a703                                                                                                                                                                                                                                                                             
Calendarriod   xxx ctermfg=0 ctermbg=195 guifg=#000000 guibg=#d5ffff                                                                                                                                                                                                                                                           
CalendarriodSelect xxx guifg=#000000 guibg=#9fe1e7                                                                                                                                                                                                                                                                             
Calendaramhe   xxx ctermfg=0 ctermbg=219 guifg=#000000 guibg=#ffaaff                                                                                                                                                                                                                                                           
CalendaramheSelect xxx guifg=#000000 guibg=#cd74e6                                                                                                                                                                                                                                                                             
Calendaramhf   xxx ctermfg=60 ctermbg=131 guifg=#586e75 guibg=#be6536                                                                                                                                                                                                                                                          
CalendaramhfSelect xxx guifg=#586e75 guibg=#882f00                                                                                                                                                                                                                                                                             
Calendaramhg   xxx ctermfg=0 ctermbg=209 guifg=#000000 guibg=#ff8d72                                                                                                                                                                                                                                                           
CalendaramhgSelect xxx guifg=#000000 guibg=#fa573c                                                                                                                                                                                                                                                                             
Calendaramhh   xxx ctermfg=60 ctermbg=203 guifg=#586e75 guibg=#ef445e                                                                                                                                                                                                                                                          
CalendaramhhSelect xxx guifg=#586e75 guibg=#b90e28 

[itchyny]

Sorry, I fixed again.

[rionda]

Yes, looks good now! Thanks!

[rionda]

Although, it would be nice to allow to have a filled interior also in dark mode, if possible?

[itchyny]

You've hit some corner cases, but it is intentional design of this plugin for dark background. I always use this plugin with dark background since I created years ago, it looks like that since its beginning, and I think it's looks better without filled colors in dark background.