Change CLOSED colors to Indigo over Black
Summary: CLosed is a pretty important state and black tends to blend in a bit. This bumps to an alternate color to improve ability to scan and know state of objects.
Test Plan:
Review a number of closed objects. I will follow up with another diff on 'Archived' colors.
{F261895}
Reviewers: btrahan, epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Differential Revision: https://secure.phabricator.com/D11222