For those who want to spawn armor with a different color (you need to have admin to do this):
/spawnitem [armornamehere] 1 '{"colorIndex":[number between 1-10]}'
tiered armors are usually just race name, tier and part of the body, (for example, humantier10chest would spawn an universalist techjacket)
vanity armor is a bit trickier, but usually it's just the name of the armor piece + part of body (examples: simplecapeback, glitchskullhead)
I can't recall exactly what number gives what color, but 1 is black, 4 is red, 8 is blue and 9 is purple. The new human armor can't be colored for one reason or another.