Yes breed jubilee to buff.
The pics look like they're basically jubilees without the mahogany.
The offspring will have one copy of mahogany so they will be darker then the buff color you want and only one copy of mottling so they won't be mottled. They'll also have one copy of dark tail so they'll have black tails but not fully black as the jubilee.
Cross those offspring together. You'll want to keep chicks without mahogany. They'll be easy to tell because they'll be buff and the ones that get one or two copies will be reddish and red.
Of course you'll want two copies of mottling and thats easy because those will show mottling.
You also want the black tails probably so keep and breed towards the ones with the most black tails or if you don't want black tails but buff tails breed that direction.
Calicos are supposed to have access white so breed the ones with the most white.
So hatch a ton of chicks and hope you get a few that have all the genes you need to line up and the ones you don't not show up.
If thats hard to follow let me know.
Edit to add. What i called black tail is db. It takes the black from tail so buff is buff instead of buff Columbian. You'll be getting rid of that gene from the buff. And losing the mahogany from the jubilee.
Thanks again!
