They really aren't showing much color at all for us this year. I think when they freeze in spring, and have to start again, autumn color is often muted. Should we change the thread title to Acer aff. paxii, I wonder?
Well, if that's the "accepted nomenclature", why not. That would mean changing the name on dozens of my archived pictures, but science above all ! ;-)
One year later: Pale green to pale pink. Very short lobes at the base, because of the heat and drought ? Probably must be pruned and repotted next year...