What are the three categories of colours

Three Primary Colors (Ps): Red, Yellow, Blue.

Three Primary Colors (Ps): Red, Yellow, Blue.Three Secondary Colors (S'): Orange, Green, Violet.

Three Primary Colors (Ps): Red, Yellow, Blue.Three Secondary Colors (S'): Orange, Green, Violet.Six Tertiary Colors (Ts): Red-Orange, Yellow-Orange, Yellow-Green, Blue-Green, Blue-Violet, Red-Violet, which are formed by mixing a primary with a secondary.

Three Primary Colors

Three Secondary Colors

Six Tertiary Colors