Blues tend to be a bit smaller, finer boned if you will; but then again it just depends on what the original sub species was, I have 3 blues out in my aviary, the one pair Male and female are nearly the same size but my pallid blue male is a larger bird than the other two. I haven't weighed them so can't offer their findings to you.
As we've mentioned before in other threads you can tell if your bird is too thin by how much you can feel his keel bone, if it protudes a lot then he's too thin and needs some weight put on So if his keel feels like an inverted V he's too thin, You shoulud be able to feel meat on both sides of the keel bond and it should be fairly firm not mushy, if its mushy or if you notice that they have cleavage then they're too fat.
My vet has told me that a good average is between 90 and 150 grams...150 for a bigger bird. If you have a small framed bird and he weighs a 150 grams you're pretty apt to see cleavage.

I've seen the larger species that have weighed up around a 170 grams and that's really pretty heavy for them as well...
Also keep in mind that a bird is at its heaviest right before they are weaned and then they will lose a little bit until they figure out what to eat and how much to eat then they're weight will climb. Depending on how active the bird is will also determine how lean they are.