First and foremost, you have to have the blue gene present. If the blue gene is not present, you will not get any kind of blue chickens, whether it is complete or with other colors. The blue gene works with the black gene, and it will always express itself when present, except when masked by white.
I took this from the Rare and Laced Wyandottes group files to share here. Maybe it will give you the answers to what you are asking.
COLOR GENETICS APPLIED TO THE BLUE LACED RED
Question: What are the affects of crossing SL & GL?
Silver is a mutation of gold, but it is dominant. Silver removes all brown
(eb). Silver is also sex linked. Male offspring would show gold in the body, but
not the hackle, saddle, and tail feathers due to the Columbian gene. He does not
recommend this cross. This would not cause brassy hackle/saddle feathers.
Question: Hans Schippers stated that both UK & American birds are mixed gold &
red. Is this correct?
I do not think there is a red that is not gold. The enhancer of red is
mahogany.
That is what makes the Rhode Island Red.
Question: Is the Mh gene involved?
I dont know.
Question: How do buff laced & gold laced differ genetically?
Modifiers. They react with gold. He mentioned champagne & blonde, but not a
specific modifier for buff laced.
Question: What are the affects of crossing Andalusian blue to lavender?
No consistency. If you could get 1 blue and 2 lavender genes, that would tone
down the color (pastel) or porcelain-ize it.
Question: How to intensify red in ground color?
Select by depth of ground color and breed up.
Question: Should we cross into another breed such as RIR?
RIR is recessive wheaten. The body type is brick shape. It would introduce
structure genes and others we do not want.
Question: Does the blue gene cause brassy hackles & saddles?
No. Could be oxidation or sunburn. Selectively breed it out.
Question: Black edged lacing of andaulsian not desirable, how do we correct?
The black edging is preferred in America. It can be bred out by selection.
Question: When out crossing to blue, what is the best way to get lacing back?
Select the best F1s and breed back to GL. This will also enrich the ground
color. Or select the best F1 male to cover the F1 females and select the best
F1s and breed back to GL. Keep records and see which line works better. Cull
the line that does not work as well. If both lines are equal, then you can
cross those offspring.
Question: What about out crossing to white?
White is a sport of SL. The silver gene will affect the gold. (refer to the
first question) He did not recommend this cross.
Question: Why do you think the German breeders do not utilize all of split gene
offspring of the BL? ( I explained the reasoning behind the black laced and it
being lanced, but also told him I had not yet got a definitive answer on the
splash or white laced)
It appears they have a problem with the GL birds lacing. Possibly why they
choose not to use a black out of blue laced.
Question: Should a black out of BL have the bettle green sheen to the lacing?
He said this was a Petty-ism, Black laced out of blue should show
bettle green.
We concluded by discussing GL. He feels we should cross into exceptional
quality GL every 3-4 generations. He suggested Bob Coulter, friend of Claus, as
being able to locate quality GL.
I have read a lot about not using GLW for outcrossing, simply because the lacing ends up being terrible - too broad around the edges and lancing toward the end. I see this more often in my darker birds than my lighter ones. I haven't had any black laced yet out of my birds, but probably because I breed my darks to my lights, so I wouldn't get any black laced unless I bred darks to darks.