Think of it as a set of principles that helps you understand:
* What colors are: (Red, blue, yellow are primary, etc.)
* How colors relate: (The color wheel shows which colors are similar or opposite.)
* How colors affect each other: (Colors can look different depending on what they're next to.)
* How to use colors effectively: (To create specific moods, attract attention, or convey information.)
In short, it's a roadmap for using color in a way that makes sense and looks good.