Lissa I don't know if your ram has the same as your angelfish,but I can tell you that I read somethimg similar not too long ago in another forum.
I remember the guy saying that he was concerned about this blue male ramirezi for it had gone half of its face black.I did not belive it 'till he showed pictures and it was all true.He was acting strange and half of its face was very dark.
A few days later the guy posted that his male had just fertilized a females eggs.So,we concluded that the black markings appeared just when it was in heat,just like the colors would get intensified on a soon to be father,this male gets half of its face totally black.weird ,but true.
Hopefully that's the same case,if not keep an eye on your blue ram.