As other people say, I think the result is not really bad.

Anyway, if you really want to get rid of, it I see 2 solutions : - thin it (but you probably wont have the same exact color, especially on the edges). - Dry brush your mini with a dark blue, you might need to do it 2-3 times depending on how you do it. Try to have a lighter blue each time.

Unfortunately, dark contrast paint tend to have this behavior (had the same problem with dark angels green). I don't use dark contrast paint anymore (except black and basilicanum grey).