alert-manager - Fix colors
alert-manager - Fix colors

Bug: skia:
Change-Id: I26dae597aa176d998bf7cf3179824811f30b8481
Reviewed-on: https://skia-review.googlesource.com/c/177911
Reviewed-by: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot