0 unable to see the difference between particular colours, especially green and red:
Colour-blind women are relatively rare.
I'm red-green colour-blind.
1 not treating someone differently because of their race:
His ambition to be an astronaut was dashed by being mildly colour-blind.
A colour-blind traffic-light installer is suing the County because it fired him for being unable to distinguish red and green wires.
All people should be equally French with no differentiation, but in practice, the nation is not colour-blind.
Politicians think they are colour-blind, but parliament's whiteness is symptomatic of what happens when you pretend discrimination doesn't exist.
Accidents have sometimes occurred because the engineers were colour-blind and red and green looked alike to them.
Ordinary pigments are never pure, and the test colours may be distinguished by those of their adventitious hues to which the partly colour-blind man may be sensitive.