If you want syntax highlighting in less, you can use source highlight software:
http://www.gnu.org/software/src-highlite
In Debian bases systems, package name is source-highlight and you can start using just setting two environment values as below:
[bash light=”true”]export LESSOPEN="| /usr/share/source-highlight/src-hilite-lesspipe.sh %s"[/bash]
[bash light=”true”]export LESS=’ -R ‘[/bash]