Color

Colors are the result of light bouncing off of stuff and reaching our eyes and more science stuff you can look up if you really care since this is the Internet and we're too lazy to write the entirety of how colors work. In fiction, color has a subtle but powerful importance that is deeply embedded in all of us. Each color's role in fiction is unique and has different functions depending on where the color appears, when, and on what.

Black
Black is an extreme color that is the opposite of white. It's the darkest color of all. Along with red, it's a color of evil.

Blue
Blue is one of the three primary colors — the other two being red and yellow. It's the color of water, the sky, and Earth from an orbital view.

Blue can be a color of good. In video games, it could be the color of the player's team.

Green
Green is a secondary color that is made by mixing blue and yellow. It's a color that simultaneously symbolizes good health and disease. Dark green is a more sickly color, while brighter shades mean life.

In video games, green is the color of health, but is also the color of poisonous substances.

Red
Red is one of the three primary colors — the other two being blue and yellow. As animal blood is red, red could symbolize violence. Incorrect tests in school often get a low percentage or an X written in red. Red is also viewed to be an aggressive and angry color, which is often why it's identified as a color of evil.

In video games, it can be the color of the enemy team. In RPGs, red is a go-to color for healing potions.

White
White is an extreme color that is the opposite of black. It's the brightest color of all of them. It's a color of good, like blue.