shell_colors

#!/usr/bin/env bash

# https://en.wikipedia.org/wiki/ANSI_escape_code


print_colors()
{
    # Print column headers.
    printf "%-4s    " '' ${bgs[@]}
    echo
    # Print rows.
    for bold in ${bolds[@]}; do
        for fg in ${fgs[@]}; do
            # Print row header
            printf "%s;%s  " $bold $fg
            # Print cells.
            for bg in ${bgs[@]}; do
                # Print cell.
                printf "\e[%s;%s;%sm%s\e[0m  " $bold $fg $bg " text "
            done
            echo
        done
    done
}

# Print standard colors.
bolds=( 0 1 )
fgs=( 3{0..7} )
bgs=( 4{0..7} )
# print_colors

# Print vivid colors.
bolds=( 0 1 ) # Bold vivid is the same as bold normal.
fgs=( 9{0..7} )
bgs=( 10{0..7} )
# print_colors


python3 <<'EOF'









print(r"256-color mode — foreground: \033[38;5;{n}m   background: \033[48;5;{n}m")
print(" ".join(f"\033[97;48;5;{n}m {n:2}  \033[0m" for n in range(0,8))+"\033[0m"+
"  "+
" ".join(f"\033[30;48;5;{n}m {n:2}  \033[0m" for n in range(8,16))+"\033[0m")
for i in range(16,232,18):
    f="30" if ((i-16)//18)%2==1 else "97"
    print("".join(f"\033[{f};48:5:{n}m {n:3} \033[0m"  for n in range(i,i+18)))
print(r"RGB - foreground: \033[38;2;{r};{g};{b}m   background: \033[48;2;{r};{g};{b}m")
EOF


echo -e "0 \033[0mreset, normal\033[0m"
echo -e "1 \033[1mbold\033[0m"
echo -e "2 \033[2mfaint\033[0m"
echo -e "3 \033[3mitalic\033[0m"
echo -e "4 \033[4munderline\033[0m"
echo -e "5 \033[5mslow blink\033[0m"
echo -e "6 \033[6mrapid blink\033[0m"
echo -e "7 \033[7mreverse video\033[0m"
echo -e "8 \033[8mconceal\033[0m (conceal)"
echo -e "9 \033[9mcrossed-out\033[0m"