GIMP Palette
Name: HW CGA (earlier CRTs)
Columns: 8
# https://en.wikipedia.org/wiki/List_of_8-bit_computer_hardware_palettes#CGA
  0   0   0	0 - black
  0   0 128	1 - low blue
  0 128   0	2 - low green
  0 128 128	3 - low cyan
128   0   0	4 - low red
128   0 128	5 - low magenta
128 128   0	6 - low yellow
128 128 128	7 - light gray
  0   0   0	8 - black
  0   0 255	9 - high blue
  0 255   0	10 - high green
  0 255 255	11 - high cyan
255   0   0	12 - high red
255   0 255	13 - high magenta
255 255   0	14 - yellow
255 255 255	15 - white