The outer/left border of the vertical tabs panel is rendered with various colours different from window border colour.
Steps to Reproduce
Vertical tabs and the option "Expand vertical tabs panel on mouseover when collapsed" have to be enabled in the settings.
Tab hover mode is set to option "Card with preview".
Interact with vertical tabs panel by clicking and moving mouse in and out
Actual result:
Vertical tabs panel (left) border is rendered with various colours different from window border colour.
See attached screen recording.
Expected result:
Vertical tabs panel border is rendered with window border colour.
Description
The outer/left border of the vertical tabs panel is rendered with various colours different from window border colour.
Steps to Reproduce
Vertical tabs and the option "Expand vertical tabs panel on mouseover when collapsed" have to be enabled in the settings. Tab hover mode is set to option "Card with preview".
Actual result:
Vertical tabs panel (left) border is rendered with various colours different from window border colour. See attached screen recording.
Expected result:
Vertical tabs panel border is rendered with window border colour.
Reproduces how often:
Always.
Brave version (brave://version info)
Version/Channel Information:
Can you reproduce this issue with the current release? Yes.
Can you reproduce this issue with the beta channel? Haven't tried.
Can you reproduce this issue with the nightly channel? Haven't tried.
Other Additional Information:
Does the issue resolve itself when disabling Brave Shields? No.
Does the issue resolve itself when disabling Brave Rewards? No.
Is the issue reproducible on the latest version of Chrome? No, it's a Brave feature.
Miscellaneous Information:
https://github.com/brave/brave-browser/assets/100283377/5eca8b46-7893-4701-9c02-db694182dfe4