The number of possible color combinations of known mutations is almost endless. Here is a list of most double mutation hybrids, and a few of the multi-mutation hybrids. These are not new colors, but combinations, or hybrids, of the mutations listed in the Recognized Color Mutations Section.

The Wilson White and Black Velvet gene carry a genetic "lethal factor," thus there is no known Homozygous White or Homozygous Black Velvet. Breeding two whites together will result in 25% fewer offspring littered, and breeding a Black Velvet or any TOV color to any other Black Velvet or TOV color will also result in 25 percent fewer offspring littered.

The Wilson White gene, due to the fact that it is an "incomplete dominant," (meaning it is not completely dominant over the natural allele "standard" grey) can manifest itself with a wide degree of variance. The Predominantly White, Mosaic, and Silver colors are all heterozygous Wilson White, they just have variances in coat pattern. This is the official MCBA description of these three variances:

1. Predominantly White - Animals ranging from totally white to white with a scattering of dark guard hair.
2. Mosaic - This (color) phase is to include all spotted animals.
3. Silver - These are determined to have an even veiling tip over the entire body giving the animals a pale grey appearance which may range from light to dark. (Silvers have dark guard hair).

All chinchillas with the Tower Beige gene, whether Hetero Beige, Homo Beige, Tan, TOV Beige, Pink White, etc…will have red eyes. If they are Heterozygous Beige, they will have darker red eyes, and if they are Homozygous Beige, they will have light red to pink eyes. This is NOT an indication of albinism.

When the white color shows up in the phenotype, the word hybrid could be replaced with silver, mosaic, or predominantly white depending on how the white gene expresses itself in that individual animal. Pink whites are technically classified as predominantly white, white and beige hybrids, with an even blend of "pink white" color." Beige and white hybrids can also express themselves as silvers or mosaics, but are sometimes called pink whites anyway.