Pearl Grey huh? I thought you were getting a Slate, what happened to THAT? lol.
Depending on what the Pearl Grey is carrying for recessive genes in it's background (if anything) you may end up with mostly Pearl Grey keets from your hatches if it turns out to be a male. Chocolate and Buff are both very recessive to Pearl Grey, so the grey color gene and the full pearling gene will most likely beat out the Chocolate and Buff color and partial pearling genes in the hatches. Who knows tho you may end up with Chocolates, Buffs, Browns, Buff Dundottes, Pearl Greys, Royal Purples plus maybe even a few surprises. Same goes for the White, if it's covering up Pearl Grey or something else... but yes it will give you Pieds. A mix of assorted colored Pieds in each hatch would be nice!
I know lots of people like Pearl Greys... but they muddy the waters too much in my flocks' gene pools, so I have to keep them out of my breeding flocks in order to hatch all the recessive colors that I want and breed for (and so I only keep Pearl Greys in my free range flock). I still have quite a few Pearl Grey keets pop up in my hatches tho, because 10 of my Hens came from a Opaline X Pearl Grey breeding pair. I also get a lot of Pied Pearl Greys out of another flock.
So far 2 of the 3 Whites that I kept from the hatches from my light flocks have turned out to be Hens, which I am thrilled about. The 3rd is staying quiet still. I have high hopes these Whites will produce lots of heavily Pied keets for me... heavily Pied Chocolates and Blondes are what I am aiming for, and a few more heavily Pied Coral Blues wouldn't break my heart either, lol.
Gonna be a fun hatching season for both of us And I'm happy for you that you are building up a nice flock and can set your own eggs next Spring instead of wasting your time, money and stress on shipped eggs, Congrats!