We can save some work by re-using the color value in a temporary.

BUG=angle:842

Change-Id: Ib64b34ca7bc77c73368e159527ad84419079f958
Reviewed-on: https://chromium-review.googlesource.com/231997Reviewed-by: Bruce Dawson <brucedawson@google.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>