A/at B/* cch/cch D/* P/*, or
Aw/* B/* cch/cch D/* P/*
"The mouse shall be as near as possible to the colour of a chinchilla with slate-blue undercolour and intermediate shade of pearl-grey. Hairs to be evenly tipped with black. Colour of feet on inside white, with remainder of foot the same colour as body - as in the standard for Tans. Belly white. Eyes black."
SH Chinchilla doe Rapunzel's Life Line
This mouse isn't a true Chinchilla, he is genetically A/at B/* cch/ce D/* P/*
SH buck Rapunzel's Per Manum
Chinchilla is one of the most important varieties in the mouse fancy as many new varieties have been obtained by crossing other colors with it. These include Silver Agouti, Silver Fox, Argente Creme and Marten Sable. It isn't one of the hardest varieties to breed, but it does have its own difficulties. One of them is molting, which Chinchilla mice appear to do more readily than many other varieties. Some also have a brownish tinge in the coat and these should not be used for breeding. I've heard light noses and poor foot colour being a bit problematic too.
Chinchilla is genetically a chinchillated Agouti Tan or a chinchillated white bellied Agouti (the Aw -gene).
Especially Agouti (but very carefully), but also Black and Blue can be used as an outcross. Fox is an option when the belly colour gets poorer, but it shouldn't be used too much - the effect is same that using Black Tan with Agouti.