colours :: [ ((Word8,Word8,Word8), Int) ]
colours = [ ((0,0,255), 1)
          , ((0,128,0), 2)
          , ((255,0,0), 3)
          , ((0,0,128), 4)
          , ((128,0,0), 5)
          , ((0,128,128), 6)
          , ((0,0,0),   7)
          , (backgroundPixel, -1)
          ]
colours :: [ ((Word8,Word8,Word8), Int) ]
colours = [ ((0,0,255), 1)
          , ((0,128,0), 2)
          , ((255,0,0), 3)
          , ((0,0,128), 4)
          , ((128,0,0), 5)
          , ((0,128,128), 6)
          , ((0,0,0),   7)
          , (backgroundPixel, -1)
          ]
colours = [ ((0,0,255), 1)
          , ((0,128,0), 2)
          , ((255,0,0), 3)
          , ((0,0,128), 4)
          , ((128,0,0), 5)
          , ((0,128,128), 6)
          , ((0,0,0),   7)
          , (backgroundPixel, -1)
          ]