Fixing cardwall cards color

Change-Id: I01308c7e53ce46c5870bef49fee617bcf7ea9298
Merge commit 'refs/changes/15/1315/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Fixing cardwall cards color

Change-Id: I4d2fe94a7a4555dc3b065347cd92e0e986c32a16
This is Tuleap 6.6.99.2

Change-Id: Ied5b7ae3ebbae62b120d38baf05cb650302895ec