R1:03d4d674f803

Clean up some colors missing from PHUITagView type shade

Summary: Grep for phui-tag-shade and verify we're no longer calling shade-color directly.

Test Plan: Search, workboard, story points, etc.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17993