What challenge? Well, there is a fact for you: 1 out of 255 women and 1 out of 12 men have some form of colour vision deficiency. Are you one of those who struggles to differentiate between colour shades and hues?
You can see for yourself by taking this online test. It would be great to know your score. Leave a comment and tell us about the test and your score. To take the test go here.