All color projects end up boiling down to is cull, cull, and more cull. That either takes a lot of space to keep birds they're not breeding, a lot of people willing to take culls from them, or a large willingness to slaughter a lot of birds based on color imperfections. Something that cemented Serama as something I wanted to breed was only having to worry about type. I think it is a big reason why they're so popular to raise for breeding even with folks new to chickens.. it is a lot less intimidating, even though you still have to be hard on the curve for a good showing bird.
It is possible to breed true with color, but for something as genetically rich in color and pattern genes as serama, I imagine the issue of culling would only be that much of a bigger problem. There is SO MUCH narrowing down to do, and that is after all the identifying. Line breeding has to be intense too, I'm sure, to cut out unwanted recessives or bring them forth. APA/ABA Whites are noted for reduced hardiness, and that is unsurprising considering such variables. Super possible to make color projects! Also super difficult, taxing on resources, and besides just putting like-birds together to try and influence the hatchlings a little and being happy with that, probably not all that fun... but that's just my opinion.
It is possible to breed true with color, but for something as genetically rich in color and pattern genes as serama, I imagine the issue of culling would only be that much of a bigger problem. There is SO MUCH narrowing down to do, and that is after all the identifying. Line breeding has to be intense too, I'm sure, to cut out unwanted recessives or bring them forth. APA/ABA Whites are noted for reduced hardiness, and that is unsurprising considering such variables. Super possible to make color projects! Also super difficult, taxing on resources, and besides just putting like-birds together to try and influence the hatchlings a little and being happy with that, probably not all that fun... but that's just my opinion.