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

src/applications/diffusion/controller/DiffusionController.php

@@ -332,7 +332,7 @@ abstract class DiffusionController extends PhabricatorController {
 
     $tag = id(new PHUITagView())
       ->setName($commit)
-      ->setShade('indigo')
+      ->setColor(PHUITagView::COLOR_INDIGO)
       ->setType(PHUITagView::TYPE_SHADE);
 
     return $tag;