Does anyone recall any peculiarities with color graphics
when using TP 4.0 on a Zenith 286 with EGA monitor?

   I have not been able to find a way to display the red
shades.

   Have tried setting the palette color numbers to everything
from 0 to 127.....no red anywhere.

I believe you'll find the problem is in the monitor, cable, or
graphics adapter.  You might want to borrow another cable and/or
try the monitor on another machine to isolate the problem.  You
might also try different graphics modes.  The problem might not
exist under all of them.