It would be great to have a LESS ( http://lesscss.org ) lexer. There's not much difference from CSS, mainly single-line comments and variables that begin with @.
We would be happy to accept a contribution.
Could you just use the Scss lexer?
@Georg Brandl what's the status of this ticket?
@David Xie there is now a LessCSSLexer, however it seems to be a pretty straight CSS lexer (which is problematic due to e.g. Sphinx unconditionally using raiseonerror when highlighting):