Tweak audit status colors.
Summary: Fixes T3242. Changes the red and orange objects to match the transactions. Also adds a highlight color to 'cards'.
Test Plan: Review my audits in my sandbox
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, Korvin
Maniphest Tasks: T3242
Differential Revision: https://secure.phabricator.com/D6184