Wow, trust me to follow up! There's pics of them at 11 weeks in their growth thread.
https://www.backyardchickens.com/threads/growth-pictures-of-2-purebred-mille-fleur-duccle-pullets.1473611/page-2#post-24616233
Their saddles are black and goldish red, and white tipped feathers are starting to come in. They are fully feathered. Their feet and legs also have black/goldish red/white feathers, as well as long shank feathers.