Using counting in base 3 to create a palette of 27 colors. The colors in a
GRB palette are closer in value from light to dark than the RGB palette.
Chnanging the shape of the numeric right argument allows different patterns
to be created.
load 'viewmat'
f=: 13 :'<.(i.y)*255%<:y'
f 3
f 4
f 5
A=:3 3 3#:i.27
B=:|.A
C=:(3 3 3#:i.27){f 3
RGBPAL27=:|.C
GRBPAL27=:1 0 2{"1 RGBPAL27
A;B;C;RGBPAL27;GRBPAL27
RGBPAL27 viewmat i.27
GRBPAL27 viewmat i.27
GRBPAL27 viewmat i.9 3
GRBPAL27 viewmat i.3 9
Linda
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