Hi leannef
I beleave what you see is a form of blushing. From what I have read is this is more common in macaws, but many other parrots do it also.
It can come from embarassment, stress, lovestruck. Many of the same things as a human when they blush.
Other members will chime in on this.
P..S. Welcome to the forum and tell us about your new friend like name age cag or tag and we love pictures.
Check in to the welcome and intro room.