Just use wget to get this file by issuing
chmod u+x set-vt-colors.sh
then execute it by
This file alters ~/.bashrc
do a tail of .~/.bashrc and look at last two lines to see what it did.
To change back do
sudo apt-get install nano (Ubuntu/Debian) or yum install nano (Centos/RedHat)
and remove last two lines.
logout and log back in. It will be back to default.