I'm not sure what anime colours are. But I would go with colours that match the surroundings that your small stool will be in. Or maybe colours that match your personality or someone else's personality that you are close to. Hope this helps. Or you could just paint an image on top :)
But I meant like the characters colors they like sorta wear Alot like bakugo's would be range and green and Deku's would be just green and it also can be more than 1 color too
I was going to say use the colours of your favourite character.Why don't you have a mix of both their colours.Green being the main one "range" sounds unque *lol*
school girl look; green white black grey pink
cool boy; red white black orange
friends; red yellow pink purple white
quiet kid; white pale yellow/green