A demonstration on how to add colors and text effects to bash terminal.

color_demo.sh

#!/bin/bash
clear

space="                               "

echo -e "\e[93;45;1m $space A COLORFUL DEMO $space\e[0m"

echo -e "Basic usage: \e[47;90mecho -e \"\e[91;1m\\\e[COLORm\e[90;22mTEXT\e[91;1m\\\e[0m\e[90;22m\"\e[0m.\n"

echo -e "Where \"echo -e\" enable interpretation of backslash escapes. You can combine
multiple effects by separating them with semicolons:"

echo -e "    \e[47;90m\\\e[COLOR;COLOR;EFFECT;ETCm\e[0mTEXT\e[47;90m\\\e[0m\e[0m\n"

echo -e "( 1) \e[1mBOLD\e[0m        ( 5) \e[5mBLINKING\e[0m"
echo -e "( 2) \e[2mFADE\e[0m        ( 9) \e[9mSTRIKETHROUGH\e[0m"
echo -e "( 3) \e[3mITALIC\e[0m      (21) \e[21mDOUBLE UNDERLINE\e[0m"
echo -e "( 4) \e[4mUNDERLINE\e[0m\n"

C=0
while [ $C -lt 8 ]; do
    echo -ne "\e[3${C}mFOREGROUND (3${C}) \e[0m"
    echo -ne "-\e[9${C}m BRIGHT FOREGROUND (9${C}) \e[0m"
    echo -e "-\e[4${C}m BACKGROUND (4${C}) \e[0m"
    let C=C+1
done

echo -e "\e[97;45m$space                  $space\e[0m"