A quick note on how to easily add colors to your bash scripts. Thanks to https://stackoverflow.com/questions/5947742/how-to-change-the-output-color-of-echo-in-linux

Here are a few ANSI escape codes for reference

Black        0;30     Dark Gray     1;30
Red          0;31     Light Red     1;31
Green        0;32     Light Green   1;32
Brown/Orange 0;33     Yellow        1;33
Blue         0;34     Light Blue    1;34
Purple       0;35     Light Purple  1;35
Cyan         0;36     Light Cyan    1;36
Light Gray   0;37     White         1;37

#Set colors to variables
RED='\033[0;31m'
GREEN='\033[0;32m'
LIGHTBLUE='\033[0;34m'
NC='\033[0m' #No color

Reference the variables using echo -e like so:

echo -e "${RED} $instance is not a valid instance. Exiting. ${NC}"

Profit.