Following sets everything up to colorise less output.

Colour-less.sh

# Pre-requisite
pip install pygments

cat << EOF > ~/.lessfilter
#!/bin/sh
case "$1" in
    *.awk|*.groff|*.java|*.js|*.m4|*.php|*.pl|*.pm|*.pod|*.sh|\
    *.ad[asb]|*.asm|*.inc|*.[ch]|*.[ch]pp|*.[ch]xx|*.cc|*.hh|\
    *.lsp|*.l|*.pas|*.p|*.xml|*.xps|*.xsl|*.axp|*.ppd|*.pov|\
    *.diff|*.patch|*.py|*.rb|*.sql|*.ebuild|*.eclass)
        pygmentize -f 256 "$1";;
    .bashrc|.bash_aliases|.bash_environment)
        pygmentize -f 256 -l sh "$1"
        ;;
    *)
        grep "#\!/bin/bash" "$1" > /dev/null
        if [ "$?" -eq "0" ]; then
            pygmentize -f 256 -l sh "$1"
        else
            exit 1
        fi
esac

exit 0
EOF

chmod u+x ~/.lessfilter
echo export LESS='-R' >> ~/.bashrc
echo export LESSOPEN='|~/.lessfilter %s' >> ~/.bashrc
# Close and re-open terminal