Some nice schemes in RGB color space
7,5,15 ... traditional pm3d (black-blue-red-yellow) 3,11,6 ... green-red-violet 23,28,3 ... ocean (green-blue-white); try also all other permutations 21,22,23 ... hot (black-red-yellow-white) 30,31,32 ... color printable on gray (black-blue-violet-yellow-white) 33,13,10 ... rainbow (blue-green-yellow-red) 34,35,36 ... AFM hot (black-red-yellow-white)
A full color palette in HSV color space
3,2,2 ... red-yellow-green-cyan-blue-magenta-red
Please note that even if called rgbformulae the formulas might actually determine the 5#5H6#6,5#5S6#6,5#5V6#6 or 5#5X6#6,5#5Y6#6,5#5Z6#6 or ... color components as usual.
Use positive and negative to invert the figure colors.
Note that it is possible to find a set of the best matching rgbformulae for any
other color scheme by the command
show palette fit2rgbformulae