Play with colour from rizome art.
I tried to copy the commands, but I can't attempt to mimic the result.

10% more blue (azure aster)
20% more yellow (yellow lily)
30% more green (green grass)
40% more brown (brown bog)
50% more orange (orange orange)
60% more pink (pink peacock)
70% more purple (purple pansy)
80% more red (red rose)
this square is completely white
this square is completely blue (blue jay, blue moon) blue
you may now quit.