Color palettes

Color.sh

#!/bin/bash
#
#   This file echoes a bunch of color codes to the 
#   terminal to demonstrate what's available.  Each 
#   line is the color code of one foreground color,
#   out of 17 (default + 16 escapes), followed by a 
#   test use of that color on all nine background 
#   colors (default + 8 escapes).
#

T='gYw'   # The test text

echo -e "\n                 40m     41m     42m     43m\
     44m     45m     46m     47m";

for FGs in '    m' '   1m' '  30m' '1;30m' '  31m' '1;31m' '  32m' \
           '1;32m' '  33m' '1;33m' '  34m' '1;34m' '  35m' '1;35m' \
           '  36m' '1;36m' '  37m' '1;37m';
  do FG=${FGs// /}
  echo -en " $FGs \033[$FG  $T  "
  for BG in 40m 41m 42m 43m 44m 45m 46m 47m;
    do echo -en "$EINS \033[$FG\033[$BG  $T  \033[0m";
  done
  echo;
done
echo

Linux

! BLACK
*color0:      #434a54
*color8:      #656d78

! WHITE
*color7:      #e6e9ed
*color15:     #f5f7fa

! RED
*color1:      #da4453
*color9:      #ed5565

! YELLOW
*color3:      #f6bb42
*color11:     #ffce54

! GREEN
*color2:      #8cc152
*color10:     #a0d468

! CYAN
*color6:      #37bc98
*color14:     #48cfad

! BLUE
*color4:      #3bafda
*color12:     #4fc1e9

! MAGENTA
*color5:      #967adc
*color13:     #ac92ec