- Warning I do not own Halo 5 yet, so I can't make myself an armor*
Agent Colorado is a mysterious Freelancer Agent that went missing. According to Agent Tennessee, a rumor was once said that he was the first freelancer to reach the top leaderboard before Agent Carolina and Texas.
Freelancer Tennessee Season 2:
After defeating Agent Oklahoma, the UNSC rewarded Tennessee a new armor. The armor was revealed to be from the missing agent. Nobody knows how Colorado died but his armor was collected ever since Project Freelancer was disbanded.