I read the coolest article about Cali Kings, which of course I can't find at this moment, but all those different looks are actually localities. Take my Chocolee, for instance, she is the Coastal locality.
Snippet from VMS: Throughout most of their range, California Kingsnakes are boldly banded in dark brown and creamy white or yellow. So-called ‘Desert Phase’ animals are colored a very high contrast black and white, with breeders selecting for solid blacks and purest whites. In scattered locations, these animals may lack all traces of bands, instead possessing a full length light mid-dorsal stripe about two scales wide.
Snippet from Pro Breeders:
50-50 DESERT CALIFORNIA KINGSNAKES - Display bright white banding at least as wide (mid-dorsally) as the dark black bands or blotches. The combination of high band count (typical of desert phase California Kings), broad expansion of the white bands, and intense contrast of the white and black coloration results in one of the most striking and unique forms of kingsnakes. The wonderful ‘look’ and the confident, docile nature of 50-50s make them a particular favorite of ours. We began the development of this project in 1988 from a portion of the original founder stock (a pair of extremely rare wild caught 50-50 specimens from the Mojave Desert and their offspring). This original stock unlocked the genetically controlled trait for expansion of the white banding. We have accomplished subsequent outbreeding to the finest quality specimens available native to Joshua Tree, California; Clark County, Nevada; and San Felipe, Baja California (these 3 localities are known for the most extreme white and black color intensity in the wild) to continue perfecting the extremes of color intensity and immaculate white banding. Through four generations of selective breeding the percentage of white pigment continues to increase. A limited number of stunning 60 to 80% white hatchlings in banded or blotch phases will be available this year.
GOLDEN-YELLOW CALIFORNIA KINGSNAKES - Individual specimens are from 75 to 95% lemon-yellow color on the dorsal surface with almost no pattern. This strain has been developed and refined since 1965. It began with wild stock from Vista (a banded individual with unusually wide lemon-yellow bands) and California City, California. Aberrant forms found in Newport Beach, Long Beach, Whittier and Los Angeles Airport areas were later introduced into the strain. Golden-Yellows have been derived from over ten generations of selective breeding, with the emphasis of this breeding program being to concentrate the genes responsible for expanding and intensifying the yellow color. As a result of this process, a small number of extreme version 95% golden-yellow progeny have been produced in the last few years.
From Split Rock:
Blue-Eyed Blond Phase
An interesting phase of the ever popular California kingsnake. These animals in their homozygous state exhibit a rare form of hypomelanism. This reduction of melanin turns the chocolate ground color of these Coastal Phase Cal kings to lighter Blond color and also accentuates the lemon yellow banding. As these animals reach adulthood the iris surrounding the pupil of the eye also transforms in a nice shade of midnight blue.