Here Simon placed the primary colors in the next to the secondary ones (that he mixed using only the three primary colors) so that the colors that are absolute opposites of each other are also standing opposite to each other: blue is the opposite of yellow, magenta is the opposite of green and red is the opposite of cyan.
On Monday this week Simon spent hours converting hexadecimals into RGBA values for the 140 colors supported by all modern browsers and creating a color file in Codea. He used the w3schools color map available at https://www.w3schools.com/colors/colors_groups.asp and an html color codes converter http://html-color-codes.info/
Some of the color names were quite exotic (like Chartreuse or Bisque ), and we looked those up together in the dictionary. We also took a very close look at the relation between red, green and blue values and found out that red was added every time to make colors lighter, even in shades where you would not expect any red.
Simon later made a nice design pattern in Codea using the color file: