GitLab

Using extracted color occasionally causes a11y problems: contrast
between background and text is not sufficient (especially error view).
New background color is a combination of extracted dark muted color
and black. When in session blur is applied.

Bug: 999390
Change-Id: Id805a359d76acb9e09ae1c0ad2c392de0d16523c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1930107Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Aga Wronska <agawronska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#718262}