CrOS Shelf: Two minor color and blur tweaks

Change-Id: I4c20d5c60a84ff48a3edbac99a70c5ee2efc038e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1487367
Commit-Queue: Manu Cornet <manucornet@chromium.org>
Reviewed-by: Alex Newcomer <newcomer@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#639126}
3 files changed