Full Idea
Just as mixing three colours of light gives white, so the three colour charges of quarks can add up to give no colour. This is what happens in the proton, which always contains one blue-charge quark, one red and one green.
Gist of Idea
Three different colours of quark (as in the proton) can cancel out to give no colour
Source
New Scientist writers (Why the Universe Exists [2017], 02)
Book Reference
New Scientist writers: 'Why the Universe Exists' [John Murray 2017], p.26
Related Idea
Idea 21149 Quarks have red, green or blue colour charge (akin to electric charge) [New Sci.]