Hi Jorgo!
Fantastic idea to add Fulco Ruffo di Calabria near the Nieuport!
The only thing that you have to know is that during WWI our pilots/personnel kept the uniforms of the Regiments they came from when they entered in the Aviation of the Royal Army. I think you follow the instruction of the figure, the red collar was right for Francesco Baracca because he came from "Piemonte Cavalleria" that had this color as a Regiment one. Fulco Ruffo di Calabria came from "11° Cavalleggeri di Foggia" that had black/red collar as colors. You may find here if you scroll down the page:
http://www.uniformology.com/RUHL-20.htmlAnother think is that about ribbons. Here
https://it.wikipedia.org/wiki/Fulco_Ruffo_di_Calabria there is a photo of Ruffo with his collection of ribbons, the three stars on the right arms indicated that is a late war photo, as Captain. When he used the Ni.17 he was Lieutnant (Tenente) as the photo in the low part of the Wikipedia page, but he sports only two lines of ribbons.
Last thing is about color of the uniform. It was in italian word "grigioverde" literally translated as "greygreen". There is no a "perfect" reference for this color, but it was more on the green side than the one I see from my computer that you choose.
http://www.esercito.difesa.it/storia/pagine/uniformi-della-prima-guerra-mondiale.aspx (the one on the left is a pilot)
Hope useful!
Roberto