A silly question?

[Rat Bag]

Do colours exist to a blind person?

[mnaz]

Born blind, only the color of the person's 'blank screen' (whatever that is), I would say....

Blind after having sight previously, the memory of colors...

Well, that's my stab at it.

[mtmynd]

explain color
never seen
in comparison

the blind dream
what is seen
how to describe

[Sober Duck]

Is the color green I see the same as the color green you see?

[Arcadia]

they don´t see nothing-nothing? Did you asked already this question to a blind person?.
I percibe sometimes grey-brown-green different as most of people do.

[Orphic]

Yes, a blind person "experiances" color.

A blind person does not see a black nothing, even someone with total blindness (which is rarer than people realize, most registered blind people being between 90 && 99% blind, which is as good as having no sight), see's and experiances things.

Close your eyes and see what you see, you will see colors, shapes etc., just as a blind person does, and you will find you even have the ability to sense certain large objects etc., at times.

Color is not just a facet of the visual apparatus of the body, but also a facet of the mind.