Bi-colors are just one level above the patternless, with the addition of a second color that appears in zones A & B. Pattern is again absent with only very faint traces of any traits showing through. When officially labeling a bi-color, you include CDE zone color/AB zone color, like red and tan or brown and dark brown, then the morph… Bi-color. Red and tan bi-color would be a correct statement. In conversation, it is common to refer to a bi-color by only its base color, which covers most of their body.
Bi-color crested geckos are two colors. Zones A and B are one color, and C, D, and E are another. The AB/CDE zone coloration can be Light color/Dark Color or vice versa.
No pattern in zones A, B, C, D, or E. Very faint traces of pattern may be visible, but typically not. There are some geckos with very little obvious pattern but not really enough to mention or qualify as being anything else so they are accepted. However, there should be no significant patterning at all.
There are some traits that are acceptable on bi-colors, just as they are on the patternless. Dalmatian spotting, portholes, kneecaps, and white fringing are all examples of "independent" traits that will not affect the morph category.
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