Looking at shell scripts or just about anything without highlighting is painful. I use less a lot to page through long stuff, so why not have some color?
sudo apt install source-highlight
then add the following to your .bashrc:
export LESSOPEN="| /usr/share/source-highlight/src-hilite-lesspipe.sh %s"
export LESS=" -R "
This is modified from a script on GitHub. That script is specific to CentOS