First off a lot of blind people have previous experience of colour, but I assume you mean people like me: completely blind people from birth.

I have cultural associations to colour from the way people talk about it and so on. Also a slight notion of light/dark, intensity and luminescence by comparing to sound frequency and intensity. That said, my notion of colour is very limited and I don't think I understand it the way a sighted person does, at all. It's just like a metaphor to me more than anything else.

I have some vision, but I am completely colorblind. Yes, I do have associations with different colors based on other people's opinions and what I've read.

I like the idea of red, pink, and purple. Blue and green seem more boring to me. Brown gets an especially bad reputation. I know gray is very drab, but I wear it pretty often because it's versatile.

A bit late to the game, but couldn't resist.

I am legally blind in my right eye; all I have left is a very small visual field that varies quite a bit. Although the vision in my left eye is still excellent, it obviously can't fill in the right side of the field.

Here's where I feel I have an unfair advantage: I have synesthesia. I taste colors; I also have color-phoneme associations. For example, if I see red-navy blue-forest green and taste licorice, I know that is the number 467 written in black ink. Thus, my right eye can often still perceive just enough information for my brain to extrapolate what might be there.

It's not 100%, unfortunately, but it does help some.

I was born blind. I don't think of colours and honestly don't care about them that much.

I had vision until I was 18, I'm blind now. For me at least, it's not just black, I see glittery shifting clouds of colors and shadows. These glittery things are not vision, meaning, it's not that I'm seeing light in the real world or anything. From most of the other blind people I know, who once had vision, a lot of people see random lights that do not really exist. When I first lost my vision these lights were so bright that they made it hard to sleep, however, they have mellowed out now, and I don't even notice them most of the time now.

I experienced vision loss later in life. In my central field of view, there is no information. It isnt an area I can even "focus" on to describe and it's frustrating to try. Early on, it was kind of a warpy, grey/brown mass where I think my brain would try to fill in the missing information. I still have a little bit of that on one side. I can see a sliver of color in my peripheral that bleeds inward. When I close my eyes, I sometimes see flashes of light.

I have perfect vision in my dreams, oddly.

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