On the left are the primary CMYK colors: cyan (C), magenta (M), yellow (Y), and black (K). On the right are the primary colors in RGB color space: red (R), green (G), and blue (B). CMYK colors are used in inks, dyes, and other paints and natural colorants, where RGB colors are used in electronic systems.
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October 4, 2018cmyk-and-rgb-colors.html