echo text in color bash script

color.sh

#!/bin/bash
start=\\033[
end=\\033[0m
Green=${start}32m
Yellow=${start}33m
Blue=${start}34m
Red=${start}31m

echo_d() {
    echo -e "${Blue}${1}${end}"
}
echo_i() {
    echo -e "${Green}${1}${end}"
}
echo_w() {
    echo -e "${Yellow}${1}${end}"
}
echo_e() {
    echo -e "${Red}${1}${end}"
}

echo_d Debug
echo_i Info
echo_w Warning
echo_e Error