Many people believe that cinny and black pastel are just lighter or darker expressions of the same gene mutation. Personally I think they're compatible but different. Subtly different mutations of the same gene. I'm sure that someone with a stronger genetics background could explain it better. But yes you have the possibility of producing a solid colored snake when bred to either a cinnamon or a black pastel. That one does appear to have characteristics of both but the pattern looks cinnamon to me, just really dark.