Magenta is one of the primary printing ink colors in CMYK process printing. It's a primary color in subtractive color mixing and a secondary color in additive color mixing (the product of red and blue). Magenta light only exists as a composite of red and blue and has no wavelength of its own.

Subtractive (printed) magenta	Additive (computer screen) magenta

Note: magenta is different than purple, violet, and pink.