Rebol Colors and X Window system

Hi: A strangeness came up in the Rebol colors under X Window ... Rebol seems to always allocate its own color map (or try to). I can't seem to convince it to use the existing color map; as I am running on an 8 bit deep display, this means rebol doesn't get all of its colors. (it only gets around 7, as that's how many entries are free). Is there any way to convince rebol to use existing "close match" colors under the X Window system ? (I made sure that system/view/screen-face/options did not say exclusive-colors ) Thanks, Andy