How accurately do you discern colours? As someone who loves art and loves to paint, I'm very aware of colours and I like to think I can see them accurately. But can I? Have you ever done the x-rite online colour challenge? Click on the link to have a go. You have to use your mouse to sort the little squares of colour into the correct order -- from pink to green, green to turquoise and so on. Then when you think you've got them into perfect order, you click to see your score. Here's the test I did just now:
It turned out to have 8 mistakes on it. The less mistakes you make the better your score. My best ever score is 4. But for the life of me I can't actually see where the errors are in the lines of colour -- I've just reached the limits of the subtlety my eyes are capable of.
The results page shows you where you got it wrong. I find it completely fascinating. Why don't you have a go and see if you can do better than me?