>>7731894
>Bad advice
...What? I never even GAVE advice. I just said most people don't understand colors. You're creating a visual product, and you want the colors to be as attractive as possible that draw the eye.
Complementing colors is like, aesthetics 101. Its all about marketability. Look at sports team logos, or movie posters, or hell, even holidays usually have 2-3 complementing colors. Your job is to catch eyes and draw people to your product.
There's even shit like pic related where people talk about how overused blue and orange is in movie posters, but it is still eye catching. And hey, guess what colors Goku, debatably the most visually recognizable anime/manga character is wearing as his default outfit?
Or look at something like Sailor Moon, or Saint Seiya, or even something like Power Rangers, where every character generally has one themed color, with some other possible minor complementary colors.
It makes them stand out, and instantly recognizable. If everyone looks the same, or has sloppy, mismatched, or ugly colors, they're going to be forgettable.