Hi Brooks
I don't know about the 1963 for certain, but the article in the "Mopar Muscle"
magazine for this month about the '57 - '59 Imperials says, "Crown convertible
top colors consisted of black, ivory, blue (with blue interiors only), and
green (with green interiors only)." The article does go on to say that
two-tone combinations were available.
You weren't asking for an opinion, but that never stopped me from offering one
before: In Texas, I'd go with the white unless there is some "authentication"
reason not to. Black top with black interior (no matter how good the a/c is)
makes for some warm motoring in this area.
Just my 2 cents worth.
Joe (also in Dallas but w/o an Imp, yet....)