Use admin CSS vars for colors

[mharju]

Hi!

A simple fix to use the CSS variables to set the colors used in the buttons. Needed this for branding so if it's useful upstream, here it is.

Thanks!

[silentsokolov]

A good improvement, thanks you. But it doesn't work on django version 3 ((

[mharju]

You're right! Maybe I'll add a check to see if we are running Django < 3.2 and set default values for the CSS variables?

[silentsokolov]

You're right! Maybe I'll add a check to see if we are running Django < 3.2 and set default values for the CSS variables?

That sounds good

[codecov-commenter]

Codecov Report

Merging #80 (74a3ab9) into master (61ab73c) will decrease coverage by 0.11%. The diff coverage is 75.00%.

@@            Coverage Diff             @@
##           master      #80      +/-   ##
==========================================
- Coverage   88.27%   88.15%   -0.12%     
==========================================
  Files          12       12              
  Lines         452      456       +4     
==========================================
+ Hits          399      402       +3     
- Misses         53       54       +1     

Impacted Files	Coverage Δ
rangefilter/templatetags/rangefilter_compat.py	85.71% <75.00%> (-4.29%)	:arrow_down:

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[mharju]

The list filter does not expose template context so I had to make a templatetag to fill in the variables.

How does this look to you?

[silentsokolov]

Awesome! Thanks!