The first color wheel (a.k.a. color circle) has been traced back to Sir Isaac Newton, who in 1706 arranged red, orange, yellow, green, blue, indigo, and violet into a natural progression on a rotating disk. As the disk spins, the colors blur together so rapidly that the human eye sees white. Artists have been experimenting with colour wheels ever since, finding inspiration in everything from cocktail umbrellas, river rocks, autumn leaves, pencil shavings, to juggling.