How to Describe a Color to a Blind Person

Start by asking, not describing

Blindness is a spectrum, and most people who are legally blind have some usable vision. Many lost their sight later in life and remember colour perfectly well; others were born blind and have never had it. A person in the first group does not need red explained to them, and being talked to as though they do is patronising rather than helpful.

So the first move is a question, not a description. Something as simple as "do you have a sense of colour, or would it help if I described it?" settles it in one exchange and puts the other person in charge of the conversation. If the answer is that they have never seen colour, the rest of this is useful. If not, just say the colour name.

Use temperature — it maps almost perfectly

Temperature is the strongest bridge, because the vocabulary already exists in both directions. We call reds and oranges warm and blues cool without thinking about it, and that is not an arbitrary metaphor — it comes from fire, sun, ice and water, which everyone has felt.

Red is the heat coming off a radiator, or the sting of a sunburn. Orange is warmth without the sting: a mug of tea you can just about hold. Yellow is sunlight on your face on a clear day. Blue is the shock of cold water on your wrists. Green sits between them, the neutral temperature of an afternoon in the shade.

This works because it gives relative structure, not just labels. Once someone has the warm-to-cool axis, you can place any new colour on it, and they can reason about combinations you have never described.

Use texture, material and sound

Texture attaches a colour to a thing that can be touched. Green is wet grass and the skin of a fresh leaf. Brown is bark, soil, worn leather. Grey is a smooth cold stone or the flat surface of a wall. White is fresh linen and new paper; black is velvet, and also the deadening quiet of a room with heavy curtains drawn.

Sound and energy carry the qualities that texture cannot. Yellow is quick and bright, like a whistle or a small bell. Red is loud and insistent, a siren or a shout. Blue is a low sustained note, and brown is slower and lower still. Pink is a soft laugh. These are not universal, but they are consistent enough that people follow them easily.

Both work best used together. "Green is the smell of cut grass, the feel of a leaf, and the sound of wind in trees" builds a much fuller idea than any single sense on its own.

What to avoid

Do not describe a colour using other colours. "Turquoise is a sort of blue-green" is useless if blue and green mean nothing yet, and it is the single most common mistake people make.

Skip wavelengths and physics. Telling someone that red is around 700 nanometres is accurate and communicates nothing about experience — it answers a question nobody asked.

Avoid overclaiming as well. You are conveying associations, not transferring an experience, and saying so honestly is better than pretending otherwise. Most blind people are entirely relaxed about this; the awkwardness is usually on the sighted side of the conversation.

Why this question is worth thinking about

It is the same problem colour vision deficiency raises in a smaller way. Someone with red-green colour blindness has never seen the distinction between a ripe strawberry and its leaves, and no description gives it to them either. The gap is narrower, but the nature of it is identical: you cannot describe a perceptual difference to someone whose eyes do not produce it.

That is also why colour-coded information is worth designing around. A chart that separates its lines by colour alone is unreadable for the roughly 1 in 12 men with a red-green deficiency, in exactly the way a colour description is empty for someone who has never seen. Adding a label, a shape, or a pattern costs nothing and removes the problem entirely.