That's understandable, there's a breed and color for everyone! I discovered the Bluebar from Brinkhaven Acres and fell in love with the appearance. I'm a sucker for blue birds and blue eggs. I thought about the appearance and genetics a bit and figured I could DIY rather than buy lol.
Once upon a time I had a beautiful flock of Blue Andalusians. 5 roos and 25 hens. I loved the appearance but, they were a little flightier than I prefer. Sadly, the entire flock was destroyed in one night by a mother fox and her kits
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The Cream Legbars is a breed that is basically a silver or golden duckwing in base color with Cuckoo barring. They have a crest on their heads and lay a nice blue (some strains more mint green) egg.
Looking at the Cuckoo Bluebar having the body type, crest and blue egg I knew that the legbar was part of the equation. The fact that they are Cuckoo and not sexlinked, both male and female barred I knew, based on barring genetics,that the legbar is the father bird. The mother bird had to have a similar body type, be blue in color and lay a white egg (as blue is dominant to white and will show over the white, if blue is bred to a brown layer the resulting offspring lay a green if varying shades egg). My best guesses were Blue Andalusians or Blue Leghorns. Given the slate legs and dark beaks I figured Andalusians as Leghorns have yellow legs and beaks. It's possible I'm wrong on this but, that's my best guess.
I already had Cream Legbars so I hunted down a couple Blue Andalusians hens, which were difficult to find in my neck of the woods! So I'm working on two separate breeding pens now I can use to line breed and cross back on to keep my genetics clean (at least for several years). My first generation is hatched and hatching this spring. Over the next couple years I'll work on culling the white egg gene out (it will appear in the second and so forth generations until culled out).