Wasn’t sure where to put this thread, feel free to move it.
Long story short, I was arguing with a friend about the worst superpower to have, and eventually we got to Color Kid, who can control color (obviously). I think it would be one that could be kinda cool, but he thinks it would be like commanding butterflies; maybe fun at parties but that’s it. I know bupkis science.
How would this be helpful in crimefighting or otherwise? 
Instant camouflage? That would make it much easier to hide from criminals, or the police, depending on the superhero.
I think this would be a fairly useful superpower. If the person were evil, they could do other things, like make bronze coins appear golden.
If you were commiting a crime and your skin started glowing purple, would you be distracted enough for the good guys to take you down?
True. I’m assuming that if you could, turning yourself invisible would be pointless though, since you would be blind? Dunno if transparency falls under this area.
I predict he would get a networked home make-over show, at the very least.
It’s a little useful – he could make everything in one place the same color. It’s PERFECT camouflage. He could enhance the darkness at night y making everything black./
He can Blind his enemies (and cameras) by making the lenses dark.
He can improve the thermal heating (or reduce it) by making things lighter or darker.
He can make scads of money from Sneetches (and similar situations)
He can prevent people from, say, finding a critical document by making all of them the same color all over. The same for money. He can effectivelu obliterate signs and labels at will.
Heck, it’s a LOT more useful than Bouncing Boy. Or Matter-Eater Lad.
Ooo,he could change lights from red to green or vice versa. Say, that means he could manipulate printed words, doesn’t it?
“Sneetches (and similar situations)”
Boy, do I get THAT all the time. 
I’m not really up on my comics any more but I seem to remember that the Green Lantern’s power didn’t work on yellow objects. What a perfect arch-nemesis for him.
Barring that, he could start his own car and / or house “painting” business.
If he can change the color of the air, then he’s in great shape: make the air in front of the person black and opaque. Even villains who don’t wear glasses would be useless.
There is a bunch of stuff you can do. You could make people wearing safety vests turn black at night so they get hit by cars. You could make red lights appear to be malfunctioning and make them green on all sides or appear to be broken to cause accidents. You could make fresh food like fish in stores turn a disgusting color so that no one will buy it. You could do the same with the cars in a car dealership or even an arch-enemy’s car. Make the asshole drive a hot pink-mobile around for a while.
Pick a popular beach and make the ocean look like it has red tide to ruin people’s vacation. Take pictures of the kids as they cry. Pick out people that are obviously fashion conscience and make their clothes and hair butt ugly day after day under they end up in the hospital from PTSD. Change their clothes back to normal just before they get to the hospital so that they look like a loon and get committed.
You get the idea. This isn’t a weak power if you have a little creativity. You can destroy lives and whole families with it which is the real purpose of any good superpower.
Or he could just make the crystalline lens of the eye opaque. Instant cataracts for enemies!
He saved Superboy, back in the Silver Age, by altering the color of Green Kryptonite to Blue. This implies altering the frequency of radiation. He may possess vast, but undeveloped, power.
BTW–can he change colors permanently, or does the change stop when he stop concentrating?
Never mind…I didn’t see that he was actually mentioned in the OP. Duh.
Perhaps like turning the white light from a searchlight to, say, the single frequency of a laser. Or the opposite - turning a laser into harmless white light.
If he can turn invisible “colors” to visible ones, there are scientific and tactical uses for that. Infrared vision or ultraviolet vision, seeing in gamma rays or radio, and so on.
Seeing in radio?
It would depend on the limits of the color-changing mechanism.
If by changing the color of something, he actually changes its physical characteristics in some way, then we’re talking about some fun stuff. Changing an object’s color might involve adjusting the wavelengths of light that are absorbed, for instance — plants are green because they absorb high-energy blue wavelengths of light (and the green light bounces off, basically, right?). Could Color Kid deforest an entire area (slowly) by turning plants pure white? They’d reflect all light, and suddenly they aren’t able to photosynthesize…
He could change the color of photo negatives, presumably tampering with criminal evidence.
If he could change the color of a green bottle to blue, or clear, then presumably he could do the same thing in reverse; he could turn someone’s windshield into black glass. … but that’s more of a refraction of light. And if he could change the refraction index of a medium like glass, then why not air? Change the refractive index of air and … instant telescope! Instant ant-burning device! Instant … well, big swirly blobby thing!
If his color-change powers are essentially telepathic illusions, then that’s different. Powerful in a different way, though.
Can he (and why is he a boy? Why not a girl?) only change to one color at a time or are blends, plaids, paisleys etc possible? I see great potential for camouflage, secrecy and mischief–why else have a superpower?
I mean, I doubt you could rule the world with it, but ruling the world is over rated.
As has been mentioned, he changed the band of kryptonite gravel that encircled the earth in the 30th Century from green kryptonite (fatal to normal Kryptonians) to blue kryptonite (fatal to Bizarro-world natives), thus making it safe for Superboy and Supergirl to remain in the 30th Century (they were visiting). If he were only changing the perception of color, that wouldn’t have worked.
Bolding added. They’re speaking of a specific person. And, oddly enough, Color Kid was a girl for a short time. (There’s something on the Wikipedia article about Grandarin Gender Reveral Disease or some other blather. Just sayin’.)
Well, jayjay, we might then reasonably wonder if the Kryptonian aversion to kryptonite is only psychosomatic. 