Set things in Xresources

[Todd Gruhn <tgruhn2%gmail.com@localhost>]

Pc 1:  XTerm*foreground: Black
          XTerm*background: Red

Pc 2:  XTerm.vt100.foreground: White
          XTerm.vt100.background: Gray10


Piece one (Pc1)  makes everything Black test on Red background
INCLUDING Main Options AND VT Fonts, and the scrollbar


Piece two (Pc 2) gives me the text and background that I want/like.
leaves the color -- Main Options AND VT Fonts, and the scrollbar


QUESTION:

How do I set the colors separately for Main Options AND VT Fonts,
and the scrollbar?