The Chromatic Chest is a limited edition Chance Chest. It was released on September 19th, and ended on September 22nd, 2014. There was no new Epic released in the chest.
1 Chest: 30 Gems
11 Chests: 300 Gems
40 Chests: 999 Gems
11 Chests: 5 Fire Fusion Boost Armors