The spectrum QL could manage 8 RGB colors on a 256 x 256 resolution, but it was possible to have a higher resolution, 512 x 256, using a reduced color pallete of the 4 colors seen here. Black was used for blue. Green covered light blue, greens and yellows. And red covered reds, purples and pinks. COLORHISTORY is a thoughtful rendering of the exploration of the history of color .