Simple Bash Text Color

#!/bin/bash

echo -e "\e[31mRed"

echo -e "\e[32mGreen"

echo -e  "\e[33mYellow"

echo -e  "\e[34mBlue"

echo -e "\e[35mMagenta"

echo -e "\e[36mCyan"

echo -e "\e[39mDefault"

exit 0

Una forma un poco mas humanizada de colorear el texto en bash:

#!/bin/bash

# colors ############
R='\e[31m' # Red
G='\e[32m' # Green
B='\e[34m' # Blue
Y='\e[33m' # Yellow
M='\e[35m' # Magenta
C='\e[36m' # Cyan
D='\e[39m' # Default
#####################

echo -e $R'Mis '$G'Notas '$B'L'$Y'i'$M'n'$C'u'$D'x'

exit 0