Hi. I had Sonar now for a week & super satisifed. Easy to use.
 
A question. I am doing my first mastering session now, and using a mulitband compressor/limiter. It sounds good, but I just noticed that some peaks in the graph shows a darker red colour than the usually Orange one. I am pretty sure the audio file is not clipping, but just need to ask to be safe. Is this just where the peaks/limiters turns on?
 
Have a Nice day

It would help if you told us what the specific plugin that you're using is. Or a screen shot?

I believe that you cannot post images until 25 written posts. He could post a link though..
But it would definetively help to know what plug(s) you / he use(s). 
All the best.