Shell color and font styles.

color

#!/usr/bin/env bash

isColorTerminal () {
    COLOR_SUPPORT=$(tput colors)
    [ -t 1 ] && [ -n "${COLOR_SUPPORT}" ] && [ "${COLOR_SUPPORT}" -ge 8 ]
}

if isColorTerminal ; then

    # Escape Squence
    ESCAPE="\x1b"

    RESET="${ESCAPE}[0m"
    
    BOLD_ON="${ESCAPE}[1m"
    BOLD_OFF="${ESCAPE}[21m"

    UNDERLINE_ON="${ESCAPE}[4m"
    UNDERLINE_OFF="${ESCAPE}[24m"

    # Foreground
    FG_BLACK="${ESCAPE}[30m"
    FG_RED="${ESCAPE}[31m"
    FG_GREEN="${ESCAPE}[32m"
    FG_YELLOW="${ESCAPE}[33m"
    FG_BLUE="${ESCAPE}[34m"
    FG_MAGENTA="${ESCAPE}[35m"
    FG_CYAN="${ESCAPE}[36m"
    FG_WHITE="${ESCAPE}[37m"

    # Foreground Bright
    FG_BR_BLACK="${ESCAPE}[90m"
    FG_BR_RED="${ESCAPE}[91m"
    FG_BR_GREEN="${ESCAPE}[92m"
    FG_BR_YELLOW="${ESCAPE}[93m"
    FG_BR_BLUE="${ESCAPE}[94m"
    FG_BR_MAGENTA="${ESCAPE}[95m"
    FG_BR_CYAN="${ESCAPE}[96m"
    FG_BR_WHITE="${ESCAPE}[97m"

    # Background
    BG_BLACK="${ESCAPE}[40m"
    BG_RED="${ESCAPE}[41m"
    BG_GREEN="${ESCAPE}[42m"
    BG_YELLOW="${ESCAPE}[43m"
    BG_BLUE="${ESCAPE}[44m"
    BG_MAGENTA="${ESCAPE}[45m"
    BG_CYAN="${ESCAPE}[46m"
    BG_WHITE="${ESCAPE}[47m"

fi