Debbie color is inherited the same way as in regular blue/ black/ splash birds. In males the areas that usually appear black in regular salmons will be blue in blue salmons and splash in splash salmons. With hens its harder to tell the the down or underfluff color will be lighter in blue salmons and splash salmons. Splash salmon hens often appear "washed out" in their salmon color. In blue salmon hens the areas in the tail and wing feathers that are black in salmons will appear blue. Hope that helps. Good luck hatching! Blue salmons were one of my favorite colors to work with. Hopefully one day I will have enough room to work with both blue salmons and regular salmons.
Henry