New tab + shows the different background color when mouse is not hovered

[GeetaSarvadnya]

Description

New tab + shows the different background color when mouse is not hovered

Steps to Reproduce

1. NA

Actual result:

Expected result:

Reproduces how often:

Easy

Brave version (brave://version info)

Brave	1.41.58 Chromium: 103.0.5060.42 (Official Build) nightly (64-bit)
Revision	de0d840bf9439c31bd86bf74f065c31fdf9b208d-refs/branch-heads/5060@{#667}
OS	Windows 10 Version 21H2 (Build 19044.1706)

Version/Channel Information:

• Can you reproduce this issue with the current release? No
• Can you reproduce this issue with the beta channel? No
• 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:

cc: @brave/qa-team @simonhong @mkarolin @emerick

[GeetaSarvadnya]

As per the slack thread @bradleyrichter confirmed we should retain brave branded colors https://bravesoftware.slack.com/archives/C7VLGSR55/p1655131986081449?thread_ts=1654874758.988509&cid=C7VLGSR55

[emerick]

Seems related to this upstream change: https://source.chromium.org/chromium/chromium/src/+/0740de35621ac0d7f7ca592c965a394818f32693.

[GeetaSarvadnya]

The issue needs to be fixed for the Search Tabs background color also. Reproduced in Linux - 1.40.103

[GeetaSarvadnya]

Verification PASSED on

Brave | 1.40.107 Chromium: 103.0.5060.53 (Official Build) (64-bit)
-- | --
Revision | a1711811edd74ff1cf2150f36ffa3b0dae40b17f-refs/branch-heads/5060@{#853}
OS | Windows 10 Version 21H2 (Build 19044.1766)

• Verified the STR from the description

Light theme

1.40.105 Before the fix	1.40.107 After the fix

Dark theme

1.40.105 Before the fix	1.40.107 After the fix

PT and TOR tabs

1.40.105 Before the fix	1.40.107 After the fix

Custom theme

1.40.105 Before the fix	1.40.107 After the fix

[GeetaSarvadnya]

Verified the comments #23423 (comment) and ensured the Search tabs bg color issue is also fixed in Linux 1.40.107