The three primary colors are red, green, and blue. Secondary colors are created when you mix two primary colors together and if you mix together the secondary colors or one primary color and secondary color, you get a tertiary color. The difference between subtractive and additive color is that additive color is color that is "pure" for example a red light looks red because it emits red light and for subtractive color is "impure" for example you perceive a red pigment to be red because it reflect red light and absorbs everything except red light falling on it. Color can affect our perception by the intensity of its surroundings, when a red is surrounded by black or white the red looks more red than it being surrounded by orange or purple.
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