The pairs of complementary colors vary depending upon whether the colors are physical (e.g. from pigments), or from light. These change the way in which the color is made, and therefore change the color model which applies. For pigments, subtractive colors apply, so the complementary/opposite color pairs, are red & green, yellow & violet, and blue & orange. In the RGB color model, which applies to colors created by light, such as on computer and television displays, the complementary/opposite pairs are red & cyan, green & magenta, and blue & yellow.
Since color printing ink does not produce color by pigmentation, but instead produces color by masking colors on a white background to reduce light that would otherwise be reflected, the same mix for producing black applies as for light producing white, i.e. the complementary/opposite pairs are red & cyan, green & magenta, and blue & yellow. The most clashing colors to the eye may still be as for painting.
Isn't the color of ink on a paper the color of light reflected by the ink, so same as color of pigments?
How does color printing ink not work the same way as pigmentation?
How does ink "produces color by masking colors on a white background to reduce light that would otherwise be reflected"? Thanks.