Yes it is. The styles are the same as before (underline|solid|outline). Colors are done the same as before as well. You just need to define the scope. By default I am using scopes that probably don’t exist in your theme. You can either define those scopes in your theme with the green color you want, or use a scope that is in your theme file that uses the green color. Before I had it defaulted to something like “entity.class” or something close to that. You can check the current BH1 branch to see what those defaults were.
But in short, just set “style” and “color” to your liking for each bracket entry.
Can you elaborate? Do you mean you want to disable all bracket highlighting in one shot? I can add that if that is what you want.