Lutino cockatiels can range from all yellow to all white; one thing they have in common is both sexes have a bright orange cheekpatch. Some Lutinos have bright red eyes, but most have maroon colored eyes upon maturity.
It is very difficult to visually sex a Lutino cockatiel. Often on mature female Lutinos there will be a barring on the underside of the tail feathers which can be viewed in front of a bright light.
Lutino is the other very common color. It is the solid white/yellow cockatiel. The lutinos can vary a lot from a buttercup yellow, to a clear snowy white. The male and female, as well as the immature tiel all have the same coloration and markings. Though the barred tail of the immature tiel and the mature hen can sometimes be seen, the fact that the occasional male can retain the barred tails doesn’t make it an easy way to tell them apart! All lutinos have the solid yellow/white body all over, including the wings and tail and belly/chest.
The head of the lutino is always a bright yellow with bright orange cheek spots. Many people assume that because of that they must have a male, but it is unlike the other colors, and both males and females can have the same brightness, therefore making the sexes look the same. All lutino cockatiels have red eyes (though it can vary from a deep red that looks dark to a bright, obvious red).
The National Cockatiel Society discourages mixing cinnamon with the Lutino mutation as it produces a mottled wash which detracts from the base color of lutinos. When chosing stock, pearl and pied are great options in which to proliferate in your lutino stock. Lutinos have suffered from some baldness behind the crest. Although several theories exist as to why this baldness occurs, breeders can avoid breeding baldness by chosing stock that is free from blatant baldspots. This will lower, but not eliminate, baldness in lutinos.