Thank you for the information misfit.Blue Mottled Belgian Bearded D'uccle
Your Roo actually looks split to the Mille Fleur color. They are not horrible birds so nevermind the FB peoples...most of us dont have perfect looking D'uccles because their very hard to get perfect.
Blue barbu d'uccle is not exactly wrong but it is the european name for the bred and they have different color names so it would not be blue there.