Me1066: The colours of the rainbow are also in the Colour Spectrum - both should be accepted. (1 year, 9 months ago)

puzzGrid: Very easy - flukily got it in 3 guesses. But nice! (2 years, 4 months ago)

Ram Dom: Unashamedly stole the idea from the person who posted a colour one before. (2 years, 4 months ago)