Sorry, Sol, not in PC Word - at least not as of 2003 (don't know about
2007).
The standard color palette provides 40 presets which cannot be changed, to
which you can add 8 more of your choice. If you attempt to add a 9th, it
will replace the 1st of your 8 custom color selections (the 10th will
replace the 2nd, etc.).
I'm not certain, but I believe that if you send a doc with more than 48
colors from Mac Word, the PC side will display all colors in the doc, but
all won't be added to a palette. If it actually adds any or how it "chooses"
which 8 to add I have no idea...if color range & accuracy is an issue I just
don't use Word in the first place