Definitely looks like a girl, if the part above the beak (nostril area) is pink/brown its a girl. If its purple-blueish its a boy. Out of my 4 parakeets 3 are girls and only one has a pink nostril area. It looks really beautiful compared to the brown.
It may change color after a while depends how old it is. If its been 5-12 months then usually it will stay that color maybe darken a bit.
Sometimes girl's beaks are even white or tan.
Congrats on the girl
