"From personal experience, I had an acquaintance who went on as Darkleer, but played the Doctor. She only did it for the hexcode. I also ran into an Equius/Nepeta lovechild who was under Equius’ tag for the color. Its honestly aggravating when you’re trying to figure out who its under so you can filter."
If you want to do this, select the character, copy the color number, and then go back to being other and paste in the number. This is not rocket science.