Much like how assigning color to a character can affect the type of personality they possess, the same can be said for the type of dynamics they develop with th rest of the cast. Here are some examples:
Red and Blue
They’re each others’ foils. Their personality often clashes with the other and serves to further emphasize both the positive and negative aspects of the other character’s personality. They either get along really well or constantly butt heads, there is no in between. They’re often rivals, either in a friendly sense or competitive sense. Even if they don’t typically get along, often times the pair will eventually reach an understanding, and whether they want to admit it or not, they care deeply about the other. Relationships with these designated colors often have the pair forge an incredibly strong relationship, be it platonic sense or romantic sense.
Pink Girl and Blue Boy
Yes, it’s 2016 and colors still tend to have specific gender associations. This one’s a rather old one that persists to this day. Unlike Red and Blue, Pink and Blue serve to emphasize the characters’ genders, and while it isn’t always the case, at times it can also be used to reinforce gender stereotypes. The blue boy is, well, boyish. He likes cars and action films and super heroes and if he’s a child, he probably has a bratty side and tends to butt heads with older characters. The pink girl is, you guessed it, girly. She likes cute things, doing activities associated with femininity, and probably doesn’t like getting dirty. If she’s a child, she probably has a crush on an older male character, giving off the message that females are more mature than males and thus prefer older males for their maturity over males their own age (who probably haven’t reached their female counterpart’s maturity level yet).
Black and White
Much like Red and Blue, Black and White serve as each others’ foil, albeit in a different manner as the above pairs. White is the good to Black’s bad, White is the pure to Black’s evil, White is the Big Good to Black’s Big Bad. It’s plain and simple. They generally don’t get along, though there have been cases where the White character tries to reach an understanding with the Black character. Success rates vary. For added angst, these characters may have also been close friends in the past, before bad stuff happened. Having them associate with different colors in the past would further emphasize the rift that’s split between them and how their views have changed over time. If the White character is the protagonist, then chances are high that they may have even closer ties to the Black character as opposed to a different colored hero.
Are There More?
There probably are, but for this guide, I decided to focus on the color relationships that are most frequently used in media.