Good Morning

It’s almost evening here :-D

Builtin lexers cannot be changed easily you, normally, write/create your
own lexer (UDL user defined lexer) is such cases.
If it is all about coloring, then another possibility is to use scripting languages like
PythonScript and add additional parsing to the builtin or UD-lexers. Some ideas.
Or you can write your own lexer using c#.