Cobalt Blue, Violet, and Mauve are all exciting color mutations waiting to be established. The feather structure of the Ringneck allows us to see both blue and green pigmentation. The wide variety of mutations being developed in this species is possible because there are both Blue series birds and Green series birds. The Lutino is actually an Albino in the Green series bird. In the Blue series the Albino is white.
Some colors are the result of a mutation which prevents the production of a certain pigment.
A bird, normally Green, which is unable to produce yellow pigment results in a Blue. When a mutation occurs in a Green bird which prevents it from producing melanin, the result is the all yellow Lutino. Pied birds occur when scattered areas over the bird's epidermis are unable to produce melanin. Some mutations have been known to occur in the wild. There is a chance, about like winning the big prize in the lottery, that this miraculous thing will occur in your own aviary.