In
Quantum Chromodynamics white refers to
particle that carries no net
color charge. We do not perceive
color charge with common particles (i.e.
protons,
neutrons, etc...) because they are
white or color neutral. The various ways that you can combine
color charges to get white are:
color + it's-anti-color = white
red + blue + green = white
anti-red + anti-blue + anti-green = white