Hi Waterpuppy,
Not being a geneticist myself I have sort advice, The general consensus is that there is not really anyway of guaranteeing what the colouration of the offspring would be.
I have included a quote below which may make it clearer or not as the case may be.
"There is not "wildtype genotype", there are several genes for different pigment cells plus the leucistics gene. A homozygous wildtype, if ever that could be named this way, would be A/A, M/M, AX/AX and D/D. In this very special case, all the offspring would be wildtype phenotype.
If the wildtype would be heterozygous for albinism, there very well would be albinotic offspring. If it was heterozygous for leucism, there could be leucistics and so on".
There is always the chance of mutations in colouration whatever the colour of the parents. This even happens in humans with caucasian parents having dark coloured offspring and Dark coloured parents having albino offspring.