we do have one full day of training on grooming that focuses on image and uniform. It's pretty important to the airline. The red lipstick is pretty signature, in whichever shade suits your skin tone (it also must match the hat). They had a bunch of different Clarins shades for us to try on when we first got our uniforms.
There is a list of things we have to wear (like foundation), but we actually get a little manual with all the rules in it. Nails have to be clear, french or the same red as the lipstick and hat. If your hair touches your collar you have to put it up, but there is some flexibility based on texture. We can do a French roll or twist, and we just got braids approved... so bohemian [laughs].