Melanistic Yellow appeared in the the 1990s. [1] The melanistic yellow is the combination of the Black and Yellow genes. In the USA this colour is often called Yellow Black, whereas in the UK the standard says Melanistic Yellow. Melanistic Yellow can can vary from light ticking to very dark ticking.
Male Mel. Yellow |
aaTo |
Female Mel. Yellow |
aaToTo |
References
[1]Logsdail, C., Logsdail, P. and Hovers, K. (2007). Hamsterlopaedia. Surrey [England]: Ringpress, p.135.