Colour Blindness and the Web

Heidi Cool posted a reply on Quora today to a question about Web accessibility.

One of the sites she referenced in her reply was a colour blindness simulator.

I thought I would try the simulator using an image that has a lot of blue in it.

Here’s the original image, followed by a screen grab of how the simulator suggested a person with that particular sight deficiency would see it.

Of course, if you suffer from this deficiency, I am not sure how it is going to look to you.

What I know is that after seeing the red yolks, I have sympathy for anyone who has this deficiency. But maybe my sympathy is misplaced? After all, I have no idea what the reaction of such a person would be to red yolks.

Perhaps they don’t seem ‘red’ at all. What would the reference be? How would a person born that way be able to communicate meaningfully with a ‘normal’ person about their reaction to such colour perceptions?

It’s a mystery.


Blue blind

If you are interested in other aspects of Web accessibility, here is Heidi’s complete answer to the question.

5 replies on “Colour Blindness and the Web”

How strange to be depressed about being able to do something new. Maybe the imagined world is sweeter than the ‘seen’ one? I recall seeing part of a TV programme about a woman who regained the sight she lost as a child. For months after the operation she couldn’t make proper sense of what she saw.


Yes, I got that. I thought maybe they got depressed because the world was ‘less’ than they had imagined? It’s a bit like religion – is the mundane really capable of being God given? Is ordinary so ordinary? That kind of thing.


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