Manual Color Function(Shell)

It is a function that can express the character color and background color at the same time.

I made it by reference through internet search.

# ==============================================================================
# Color Function
# ==============================================================================
cecho() {
    if [ -n "$3" ]
    then
        case "$3" in
            black  | bk) bgcolor="40";;
            red    |  r) bgcolor="41";;
            green  |  g) bgcolor="42";;
            yellow |  y) bgcolor="43";;
            blue   |  b) bgcolor="44";;
            purple |  p) bgcolor="45";;
            cyan   |  c) bgcolor="46";;
            gray   | gr) bgcolor="47";;
        esac        
    else
        bgcolor="0"
    fi
    code="\033["
    case "$1" in
        black  | bk) color="${code}${bgcolor};30m";;
        red    |  r) color="${code}${bgcolor};31m";;
        green  |  g) color="${code}${bgcolor};32m";;
        yellow |  y) color="${code}${bgcolor};33m";;
        blue   |  b) color="${code}${bgcolor};34m";;
        purple |  p) color="${code}${bgcolor};35m";;
        cyan   |  c) color="${code}${bgcolor};36m";;
        gray   | gr) color="${code}${bgcolor};37m";;
    esac

    text="$color$2${code}0m"
    echo -e "$text"
}

ex. black font, yellow background

# cecho bk "Hello World!!" y