Happy birthday Ulu! Color Kid (Ulu Vakk of the planet Lupra) is a member of the Legion of Substitute Heroes in the 30th century. Ulu Vakk was assisting a scientist when a beam of multi-colored light from another dimension struck him, granting him his singular super ability. He tried out for the Legion of Super-Heroes, but was rejected. He later joined the Legion of Substitute Heroes, a group formed of rejected Legion applicants.
He changed the color of a kryptonite cloud around Earth from green (deadly to then-current members Superboy and Supergirl) to blue (harmful to super-powered Bizarro creatures).
As an adult, he was known as Color King, and finally becomes a member of the Legion when it merges with the Legion of Substitute Heroes.
In the 1985 Legion of Substitute Heroes one-shot comic, he was temporarily known as Color Queen after being exposed to Granderian Gender-Reversal Germs by Infectious Lass.
The BG it's a nebula shot from erenscoolstuff.blogspot.com.
I feel like I could still play with the super powers FX.