So in SN12.19 we have contact resulting from the dyad of the internal sense bases ( body ) and external name+form. I’m still not clear what “external name+form” means here, practically speaking, and whether it is the same name+form described in DO ( I suspect not ).
Meanwhile in the Loka Sutta ( SN12.44 ) sense-consciousness arises in dependence upon internal and external sense bases, eg eye and form, and the meeting of the three is contact. So here the external aspect is just form, rather than name+form
With your example of the hand, shape and colour look like perceptions, and so presumably a function of sanna. Perhaps you could call this “named form”?