These two main color profiles are both widely used with the RGB color profile being one of the most common. This site includes hex codes for each color listed.
Color wheel via Yulia Glam.

. The color defined as blue in the CMYK color system used in printing also known as pigment blue is the tone of blue that is achieved by mixing process printers cyan and process printers magenta in equal proportions. If magenta cyan and yellow are printed on top of each other on a page they make black. RGB diagram via petrroudny43.
In the CMYK color model used in color printing it is one of the three primary colors along with cyan and yellow used to print all the rest of the colors. The purpose of the CMYK color system is to provide the maximum possible gamut of color reproducible in printing by the use of only three primaries. How Does RGB Work.
CMYK in contrast is mainly used for print operations. RGB consists of red green and blue hues that can create a wide array of different colors when combined. A free service that provides information about any color including conversions to many color models RGB CMYK HSL HSV XYZ xyY CIELAB CIELUV CIELCH Hunter Lab and YIQSchemes harmonies like complementary split-complementary triadic tetradic five-tone clash.
In this model magenta is the complementary color of green and these two colors have the highest contrast and the greatest harmony.
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