Goethe found he prefered to arrange colour in the form of a triangle. It is arranged in some ways like the colour circle but I agree with Johann, the the triangle is good because you can isolate the groups more easily. I'm not sure if I agree with the names of each of the groupings - but it is easy to see the colour groups. How can yellow, orange and green be called 'serene' for goodness sake?! I find my taste goes to the 'serious', melancholic' and 'mighty', whatever the latter means.