You're welcome, MidlandsUK.
Due to the fact that greywings dilute the body colour by 50%, the type of blues or greens are quite difficult to identify. For instance, I knew my Jossy, a dilute mutation, is cobalt after I bred her whom all this while I thought she is skyblue but not. Her offsprings turned up mauve blue, then only I know she is cobalt blue.
Chick no.1 looks like violet in the picture you posted. This means the chick could be violet skyblue or violet cobalt. Greens are very difficult to see violet in a green body colour.
Excellent major you take in your undergraduate studies. Plenty of job opportunities awaiting you after you graduate. Good luck.