What color eggs might I get?

[luke20]

Since you already know that brown over blue makes green, I assume you're trying to figure out how much "brown" will get passed to the chicks.

It's all going to come down to what genes the rooster has.

In general, if you cross two brown-egg layers, you get brown eggs.
Dark brown + light brown usually gives medium brown.
White + brown usually gives light brown.
But sometimes white-egg rooster with brown-egg hen gives white eggs (there's a sex-linked gene that can apparently prevent all the brown.)

So you've got some chance of getting just blue eggs, but I think a much greater chance of getting shades of green. Also some chance of getting brown eggs, with no blue/green at all.

I think there are multiple different genes that affect the shade of brown, and that no-one's really figured them out. People mostly just hatch the darkest eggs or the whitest ones, if they're trying to breed one direction or the other.

Thanks!