Color del texto en scripts bash

flash.sh

#! /bin/bash

# Variables
# ------------------------------------------------------------------------------

txtSuccess='\033[1;32m'
txtError='\033[0;31m'
txtNoColor='\033[0m'


# Functions flash messages
# ------------------------------------------------------------------------------
function flashError {
    echo -e "$txtError$1$txtNoColor"
}

function flashSuccess {
    echo -e "$txtSuccess$1$txtNoColor"
}

flash_description.md

Código de colores

Black        0;30     Dark Gray     1;30
Blue         0;34     Light Blue    1;34
Green        0;32     Light Green   1;32
Cyan         0;36     Light Cyan    1;36
Red          0;31     Light Red     1;31
Purple       0;35     Light Purple  1;35
Brown/Orange 0;33     Yellow        1;33
Light Gray   0;37     White         1;37
No color     0

Forma de uso:

echo -e "\033[0;31mThis is a message\033[0m"