Unlockable Costume Colors:
Unlock the following costume colors for a character by reaching the corresponding rank while using that character:

COLOR – RANK
Color 1 – Reach the rank of Mentor
Color 2 – Reach the rank of Master
Color 3 – Reach the rank of Rogue
Color 4 – Reach the rank of Brawler
Color 5 – Reach the rank of Marauder
Color 6 – Reach the rank of Berserker
Color 7 – Reach the rank of Warrior
Color 8 – Reach the rank of Avenger
Color 9 – Reach the rank of Vindicator