FlamingParrot has new variants

Implements tasks #7130: add new colors

Part of story #6003: be able to change the Experimental theme color.

Change-Id: Ib5ac1f0ee27b5b62f9ca0c3c559b62f1d1035373
Merge commit 'refs/changes/03/2703/4' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  FlamingParrot has new variants

Change-Id: I6987ab46ae1ce6194b808cacd4e655a85068240c
This is Tuleap 7.2.99.11

Change-Id: I85ad61a411c589212dbe5cde121732e30715a6ed