Females will have a light blue/ white cere depending on their age, and can sometimes have a little bit of pink around the edges of there cere.
They will have very light blue/white around their nostrils which is the most obvious sign of a female, despite having a little blue or pink around the outsides of the cere. As they get older it will get more white with very light powder blue until they come into breeding condition.
Female- Grey green spangle
Female- Grey green dominant pied
Female-Yellowface albino
Female-Dark green normal