hsv, hsb := hue saturation and value (or brightness)
cymk := cyan magenta yello and key, this is additive
color
Hue can be thought of as where in the color wheel you are. Red is at 0⋅ … green is at 180⋅ … red again at 360⋅.
In grafx2, hsv are all represented as 8-bit integers (their value goes from 0-255).