Chrome Version: 73.0.3660.0 (Official Build) Revision	170f55273fbe689f402eade1a4e98fa2788938a2-refs/branch-heads/3660@{#1} (32/64-bit)
OS: Windows (7, 8, 8.1, 10), Mac(10.13.1, 10.13.6, 10.14.3) & Linux(14.04 LTS).

URL: https://chrome.google.com/webstore/detail/black-blue-shards/hgoflmajhinnohnhkfeggflmmppiilck?hl=en

What steps will reproduce the problem?
1. Launch Chrome and install any dark theme from CWS or using above URL.
2. Open two NTP and observe the tab-strip of opened NTP.

Actual: Unable to differentiate the tab-strip of opened NTP.
Expected: Should able to differentiate the tab-strip of opened NTP.

This is a regression issue, broken in M-70 series, below is manual regression range:

Good build: 70.0.3505.0 (Revision: 578874)
Bad build: 70.0.3506.0 (Revision: 578942)

Chromium bisect:
  https://chromium.googlesource.com/chromium/src/+log/7a6803660bcc2cac1c0ab9e04906fcfd3c865553..7afb4f391067e7f043fc79d27bda0a7b27d33495

Suspecting: https://chromium.googlesource.com/chromium/src/+/7afb4f391067e7f043fc79d27bda0a7b27d33495

@pkasting: Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

NOTE: 
1. Provided suspect through 'Chromium bisect' script because unable to perform bisect using 'per-revision' bisect script.
2. Tried performing 'per revision' bisect on multiple Windows and Mac machines but unable to perform the same since getting "Error running the gsutil command: AccessDeniedException" error.

Kindly review the attached screen-cast for reference.

Thank you.
 

Deleted: Tabstrip_screenshot.png 78.8 KB

	Tabstrip_screenshot.png 78.8 KB View Download

Deleted: Actual behavior.mp4 694 KB

	Actual behavior.mp4 694 KB View Download

Deleted: Expected behavior.mp4 1.1 MB

	Expected behavior.mp4 1.1 MB View Download