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In the theory of quantum chromodynamics, quarks come in three colors. How would you justify the statement that all baryons and mesons are colorless?

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The word “color” has been adopted in analogy to the properties of the three primary colors (and their complements) in additive color mixing. Each flavor of quark can have colors, designated as red, green, and blue. Antiquarks are colored antired, antigreen, and anti-blue. We call baryons and mesons colorless. A baryon consists of three quarks, each having a different color: the analogy is three primary colors combine to form no color: colorless white. A meson consists of a quark of one color and antiquark with the corresponding anticolor: the analogy is a primary color and its complementary color combine to form no color: colorless white.

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