I would have read this some time probably in the early 1990s. I don't remember how old it was at the time.
I only remember the beginning, and a snatch of details from it:
Several blind characters
One of the blind characters told his mother to take her umbrella with her, because it was raining. She looked but didn't see any rain.
One blind boy, possibly named Chris or similar, described the rain as being of different colours; he described the colours in terms of emotion. He described one colour as 'looking like when you feel angry', which his mother interpreted as red.
I think the other blind characters also saw the rain, but I can't remember enough detail to be sure.
The mother did go outside, but took her umbrella. I think there were a few people carrying umbrellas, but not everyone. After she got back, the mother saw small holes all over the umbrella.
I don't remember the author, but I think it was an oldish book at the time. I don't remember if it was a novel or part of a short story collection.