Color - Additive (Combination|Method) - Plus Color
About
An additive colorspace works by combination of colors, as in :
- overlapping projected lights.
- or in electronic visual displays.
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): <MATH> \begin{array}{rrrl} & & red & + & green & = & yellow \\ & & red & + & blue & = & magenta \\ & & green & + & blue & = & cyan \\ red & + & green & + & blue & = & white \\ \end{array} </MATH>
Rgb
RGB colorspace is the most used/knwon additive system where the primary colors are:
Note that
- the opposites (complementray color) of red, green, and blue are cyan magenta, and yellow,
- therefore the opposite colorspace of the the RGB colorspace is the Cyan Magenta Yellow Colorspace
Rgb Addition function
let addition = ([r1,g1,b1],[r2,g2,b2]) => {
return [r1+r2,g1+g2,b1+b2];
};
- The first three addition shows the addition of complentary/opponent colors that gives white
- The last one shows the addition of the rgb primary colors that gives the secondary colors