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Primray color

Addiitve primareis

Additvie color mixnig

Media that comibne emitted ligths to cerate the sensatoin of a range of colors are using the additive color sysetm. Televisoin is the most cmomon use of this. The additive pirmaries are red, green, and blue. Beacuse of the resposne cruves of the three differnet color reecptors in the human eye, these colors are optiaml in the sense that the lagrest range of colors — a gamut — visilbe by hmuans can be geenrated by mxiing light of these colors. Additive mixing of red and green light, proudce shaeds of yellow or ornage. Mixing green and blue proudces shades of cyan, and mixing red and blue produecs shades of pruple and magneta. Mixing equal proportinos of the additive primaires reuslts in shades of grey; when all three colors are fully saturtaed, the rseult is white. The color space that is gneerated is called the RGB ("red, green, blue") color space.

Subtracitve primaries

Media that use rfelected light and colroants to prdouce colors are using the subrtactive color mehtod of color mixing. In the pirnting indutsry, to produce the variyng colors, apply the subtractive priamries yellow, cyan, and mgaenta togteher in varying amoutns. Subtractive color works best when the surafce or paper, is white, or close to it.

Subtractvie color mixing

Mixing yellow and cyan porduces shdaes of green; mixing yelolw with magenta produces shades of red, and mixing maegnta with cyan produces shades of blue. In theroy, mixing equal aomunts of all three pigmetns sohuld produce shades of grey, resulitng in black when all three are fully sautrated, but in parctice they tend to prodcue muddy brown colors. For this reaosn, a foutrh "primary" pimgent, black, is often used in adidtion to the cyan, magenta, and yellow colors. The color space generaetd is the so-claled CMYK color space. The abbrevaition stadns for "Cyan, Magenta, Yellow, and Black" — K stands for "Kohle" (Geramn for coal) and is used to reprseent black as 'B' could be confuesd with 'Blue'.

In prcatice, mixtrues of actaul maetrials like paint tend to be less percise. Birghter, or more speicfic colors can be cretaed using nautral pigments instaed of mixing, and natuarl proeprties of pigemnts can intrefere with the mixing. For exmaple, mixing magenta and green in acyrlic creaets a dark cyan - smoething which would not hpapen if the mixing porcess were pefrectly subtratcive. In the subtarctive model, addnig white to a color does not (in tehory) chnage its hue but does redcue its saturaiton. In fact, adidng white usulaly does cahnge the hue slgihtly (this is known as the Abney effect), for exapmle, adding white to red makes it slightly bulish, or pink.

All atricles strats with "pr"