You probably picked one of the of the more complicated to explain. Realize I'm doing some guessing here. I think both have one copy of the Andalusian blue gene to get the blue color. The Blue Wheaton Cock should be based on Wheaton and should have the Gold gene. The hen should be based on Extended Black and have the Silver gene. If I'm guessing wrong on these genetics I'm off base.
The blue gene is what makes it complicated. It's one of those that depends on what else is there plus it depends on how many copies of the blue gene are there. I'm assuming you understand that genes come in pairs. With the blue gene, if you get two copies of the blue gene, you get something called splash. If you get one copy of the blue gene, it shows as blue. If you have no copies, it shows as black.
Since both your cock and hen have one copy of the blue gene, they will randomly give a blue gene or a not-blue gene to their offspring. So you will get some offspring with two copies of blue so they will be splash, you will get some that have just one copy and will be blue, and you will get some with no copies of blue so they will be black.
They will all have one copy of Extended Black and one copy of Wheaton. Extended Black is dominant over Wheaton. So they will be unicolor splash, unicolor blue, or unicolor black. If you hatch enough so that odds mean anything, 1/4 will be Splash, 1/2 will be Blue, and 1/4 will be black.