# Color - Additive (Combination|Method) - Plus Color

An additive colorspace works by combination of colors, as in :

• overlapping projected lights.

Addition of paint or dye is known as a subtractive model because the light reflection filters colors out

Additive primaries color are also known as Plus color

On a color wheel, they are located a 120 degree of each other.

For any colorspace, the plus color (ie additive color) are the opposites (complementray color) of the minus color (subtractive color)

This mixing are valid for all additive colorspaces (even if the most known is RGB): $$\begin{array}{rrrl} & & red & + & green & = & yellow \\ & & red & + & blue & = & magenta \\ & & green & + & blue & = & cyan \\ red & + & green & + & blue & = & white \\ \end{array}$$

## Rgb

RGB colorspace is the most used/knwon additive system where the primary colors are:

Note that

let addition = ([r1,g1,b1],[r2,g2,b2]) => {
return [r1+r2,g1+g2,b1+b2];
};


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