I find the default colour choices in many terminals and in Dwarf Fortress to be pretty terrible. My main peeve is that dark blue is too dark and thus invisible against a black background, and colour 6 ("yellow") is usually a pretty terrible mustard colour instead of the brown it's meant to be. (Really: although the original IBM PC CGA card signaled "half-red-half-green-no-blue" for that mustard colour, the IBM 5153 monitor designed to be hooked up to the card detected this signal and added in a little blue for a more tolerable brown colour.)
data/init/colors.txt.
000000 [BLACK_R:0] [BLACK_G:0] [BLACK_B:0] 40508c [BLUE_R:64] [BLUE_G:80] [BLUE_B:140] 008000 [GREEN_R:0] [GREEN_G:128] [GREEN_B:0] 008080 [CYAN_R:0] [CYAN_G:128] [CYAN_B:128] 8c2010 [RED_R:140] [RED_G:32] [RED_B:16] 800080 [MAGENTA_R:128] [MAGENTA_G:0] [MAGENTA_B:128] 945924 [BROWN_R:148] [BROWN_G:89] [BROWN_B:36] c0c0c0 [LGRAY_R:192] [LGRAY_G:192] [LGRAY_B:192] 808080 [DGRAY_R:128] [DGRAY_G:128] [DGRAY_B:128] 4040ff [LBLUE_R:64] [LBLUE_G:64] [LBLUE_B:255] 00ff00 [LGREEN_R:0] [LGREEN_G:255] [LGREEN_B:0] 00ffff [LCYAN_R:0] [LCYAN_G:255] [LCYAN_B:255] ff0000 [LRED_R:255] [LRED_G:0] [LRED_B:0] ff00ff [LMAGENTA_R:255] [LMAGENTA_G:0] [LMAGENTA_B:255] ffff00 [YELLOW_R:255] [YELLOW_G:255] [YELLOW_B:0] ffffff [WHITE_R:255] [WHITE_G:255] [WHITE_B:255]
A link I find useful: list of html colour names
my gnome-terminal's pallette:
['rgb(0,0,0)', 'rgb(191,64,64)', 'rgb(0,128,0)', 'rgb(148,89,36)', 'rgb(64,80,140)', 'rgb(128,0,128)', 'rgb(0,128,128)', 'rgb(192,192,192)', 'rgb(128,128,128)', 'rgb(255,0,0)', 'rgb(0,255,0)', 'rgb(255,255,0)', 'rgb(32,32,255)', 'rgb(255,0,255)', 'rgb(0,255,255)', 'rgb(255,255,255)']
Posted 2015-11-28, last edited 2016-08-31