Ok. Well I am in Australia and I do have blue and splash Australorps. As well as the black.
The BBS colours works the same as silkies do. Is this true in other countries as well?
To breed splash cross a blue with a blue approx 25% of offspring will be splash ,all it is ,is a double dilution of black (bl+/bl+) ...blue = (Bl/bl+) and splash is Bl/Bl)