Highlight a substring

["Grizzly M" <grizzlym@xxxxxxxxxxxxxxxxxxxxx>]

I'm trying to highlight part of an alphanumeric field, but I can't seem
to find the hex equivalent of high intensity or the color white.  I know
I can use %Subst(SomeAlpha:5:5) = x'21' to reverse image part of a
string. I figured I'd try the same concept. I looked in the RPG and DDS
references but I can't find what I'm looking for. Does anyone know where
I can find a table explaining hex codes or the hex equivalent of high
intensity or the color white? 

Thanks