Cutterpup, kmarch explained it well to show how difficult it is to get what you want in plant.
May be getting the colours may be easier that many other features, depending on the colours that you may want.
Just to add a little more to what kmarch said about dominant and recessive characters a whole lot of other facters play a role in gene-recombination.
Even a 'weakest' gene can be carried on (genotype) and express itself(phenotype) 16 generations down the road. Though some of the results we want can be achieved under controlled laboratory conditions it will be almost next to impossible to get the results you want 'in home experiment'. You may, however , get what you want in your next batch (based on the theory of chances) but that will be a just random chance: beside it will be just what they refer to as 'phenotypical expression' and the genetic makeup will be far from it. To make things more confusing some features may be controlled by more than one gene( multiple foci) and that will make it virtually impossible to get the right 'hybrid'
Unless you want to try it for fun it will be better to follow kmarch's advice
I am not sure even the orchid breeders know exactly what the outcome is going to be. May be kmarch can tell us that. Thanks