It's tough to say. Colour genetics can be mysterious. I can offer an example, but it's not quite the same. My mare's sire was a Paint and was heterozygous. Dam was solid. The resulting foal also ended up being solid. I had her tested a few months back and she carries absolutely zero of the testable Paint colour markers (results are below.) I think there is small chance that the foal might not carry any markers, however, I'm not positive. I know my example is a little different because one mare was already solid.
Something that might make it a bit easier is to go on the Coat Color Calculator
and you can see the possible colour genetic combinations.
N/N No evidence for the altered sequence detected.
N/N No evidence of altered sequence detected.
N/N No evidence of altered sequence detected. Horse is not Tobiano.
WHITE SW-1 N/N No copies of SW-1 mutation.
N/N No copies of SW-2 mutation.
N/N No copies of SW-3 mutation.