Rewards and welcome page favicons are completely black

[GeetaSarvadnya]

Description

Rewards and welcome page favicons are completely black

Steps to Reproduce

1. Clean profile 0.65.107
2. Enable Rewards
3. Verify the favicons for Welcome and Rewards page

Actual result:

Rewards and welcome page favicons are completely black

Expected result:

Rewards and welcome page favicons should be visible

Reproduces how often:

Easy

Brave version (brave://version info)

Brave 0.65.107 Chromium: 75.0.3770.38 (Official Build) beta (64-bit)
Revision 3860105745f2b12537da9e9f048f14c3f52ba970-refs/branch-heads/3770@{#618}
OS Linux

Version/Channel Information:

• Can you reproduce this issue with the current release? No
• Can you reproduce this issue with the beta channel? Yes
• Can you reproduce this issue with the dev channel? Yes
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? NA
• Does the issue resolve itself when disabling Brave Rewards? NA
• Is the issue reproducible on the latest version of Chrome? NA

Miscellaneous Information:

@brave/legacy_qa

[NejcZdovc]

@GeetaSarvadnya I guess this is dupe of #3933?

[GeetaSarvadnya]

@NejcZdovc I have not changed the theme, with Default theme Light itself I am seeing favicons black

[NejcZdovc]

I think root cause is the same

[srirambv]

@NejcZdovc this is dupe of #3933. Its the theme on Linux which makes it either dark or white. I see white icons similar to #3933