Sometimes you need precise numerical control over colors. You might also need to match two colors exactly or adjust a color channel independently.
Every set of color controls has a disclosure triangle, which, when clicked, reveals sliders for the Red, Green, and Blue color channels. You can choose or fine-tune a color by adjusting these sliders. Among other uses, these controls are handy when you need to keyframe each color channel differently.
For information on setting colors in wide gamut, see Wide color gamut overview.