R1:cca5078d9fbc

Make attention count yellow

Summary:
It needs attention! Serious color for serious action.

Also, Flags probably need urgent action!1!

Test Plan: Reload Hompage, see new color

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin, chad

Differential Revision: https://secure.phabricator.com/D8644