I don't have tons of experience with wheaten.
But about blues... crossing a black and white does not make blue. Blue is made when a bird inherits one copy of "Bl" the blue or color diluting gene. When a bird inherits two copies of the blue gene Bl/Bl then the bird has a double dose of the diluting gene and will appear white with spots of color here and there. This is called Splash. It is not really a white bird. It still really is a black bird with two copies of the gene that dilutes color.
This may seem like splitting hairs but white and splash are two very different things.
When a black bird with no Bl gene is bred with a splash bird that has two copies all the offspring will be blue because the splash parent gives one copy of the blue gene. The black parent cannot pass on a blue gene obviously.
I don't know much but I have studied my blue-black-splash genetics. lol
Sorry, I wasn't clear in my post. I do know that white and splash are different and that white and black can not make blue. But I have seen some people who don't understand the basics of how B/B/S work approach it with the idea that you could cross a white bird with a black bird and get blue. I really meant it more of an example of how breeding colors in birds is nothing like mixing paint colors and did not intend to make it seem as though you could get a blue bird from a white and a black.
Oh! You joke? Lol