Show an index of all available bash colors (OS X version)

color_index.sh

color_index() {
    # Show an index of all available bash colors
    # Adapted from http://madebynathan.com/2011/08/16/bash-color-index/
    echo -e "\n              Usage: \\\033[*;**(;**)m"
    echo -e   "            Default: \\\033[0m\n"
    # Top border
    echo -e "     \033[0;30;40m                                         \033[0m"
    for STYLE in 2 0 1 4 9; do
        echo -en "     \033[0;30;40m "
        # Display black fg on white bg
        echo -en "\033[${STYLE};30;47m${STYLE};30\033[0;30;40m "
        for FG in $(jot - 31 37); do
            CTRL="\033[${STYLE};${FG};40m"
            echo -en "${CTRL}"
            echo -en "${STYLE};${FG}\033[0;30;40m "
        done
        echo -e "\033[0m\n     \033[0;30;40m                                         \033[0m"
    done
    echo -en "     \033[0;30;40m "
    # Background colors
    echo -en "\033[0;37;40m*;40\033[0;30;40m \033[0m" # Display white fg on black bg
    for BG in $(jot - 41 47); do
        CTRL="\033[0;30;${BG}m"
        echo -en "${CTRL}"
        echo -en "*;${BG}\033[0;30;40m "
    done
    echo -e "\033[0m"
    # Bottom border
    echo -e "     \033[0;30;40m                                         \033[0m\n"
}