Here's the ANTLR HRC by Andrey Breslav.
ANTLR HRC is a Colorer highlighting profile for ANTLR v3 files.
Please, download here.
Installation instructions:
- place antlr.hrc file wherever you want
- modify your <colorer>/hrc/proto.hrc file as follows: add the following descriptor after <!-- rare languages --> comment
<prototype name="antlr" group="rare" description="ANTLR">
<location link="<path to antlr.hrc>"/>
<filename>/\.(grammar|g|g3)$/i</filename>
<firstline>/^(parser|lexer|tree|grammar)/</firstline>
</prototype>