There are many Maltipoo colors, both solid and parti (meaning a mix of 2 or more), however one of the most popular and sought after is the white Maltipoo. A white Maltipoo is bred by pairing a solid white Maltese (some not-so-well bred ones are a light cream) and a purebred solid white toy Poodle.
Now, the coloring does not just come from the parents (dam and sire)....Genetics can pass down coat coloring from at least 5 generations back....And in rare cases even further back.
Therefore, one would need to know the coloring history for both the dam and sire. This can be a bit tricky....Why? Because most dogs are registered when they are puppies.
And, for example, an apricot
Poodle may be born white and then change as the puppy coat turns into the adult coat. Therefore, that dog may be registered as white, but they are not...And they hold a colored gene and it will be passed down when the dog is bred.
This goes for all generations. Therefore, patience must be had when planning a breeding program, to have both female and male dogs who only have pure white in their genetic history....And this will ensure white Maltipoo puppies.