This test was failing on some systems because of overly stringent
color expectations.

BUG=angle:809

Change-Id: I817de315ff6de46fb87f8ed1c21e3bb62c133176
Reviewed-on: https://chromium-review.googlesource.com/225262Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>