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This content is taken from the KLC School of Design's online course, The Power of Colour. Join the course to learn more.
Ishihara test for colour blindness
71? 24? No numbers?

Testing your colour vision

Do you think that you have excellent colour vision?

Colour blindness, also called colour vision deficiency, results in difficulty distinguishing between colours. Colour blindness is most often found in males. The ‘x’ chromosome carries the most common genes related to this condition and females, who each have 2 ‘x’ chromosomes, have a second chance to develop a fully functioning set of cones.

Only 1 colour is repeated in this grid - can see which colour appears twice?

Only 1 colour is repeated in this grid - can see which colour appears twice?

Click here to see the repeated blocks

Globally, colour blindness affects 1 in 12 men and 1 in 200 women. In the UK approximately 4.5% of the population is colour blind - the majority being male.

This article describes how graphics and maps can be presented more clearly to include those with colour vision deficiency.

  • Can you see the nuanced differences between the colours in the grid above?

  • Do you work with colour and do you allow for different level of colour vision as part of your work?

Use the comments section to share your thoughts on this article.

Find out more - if you have a laptop or desktop you can take this quick online test to check your colour accuity:

Farnsworth Munsell 100 Hue Colour Test

Follow the link and click on the image of dials.

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This article is from the free online course:

The Power of Colour

KLC School of Design