Better program than xcolors?

Somewhere or other, quite a while ago, I saw a program that does the same thing as xcolors, only better and more conveniently, i.e., it shows you the color associated with each name in the X rgb color map. Can anyone point me to it? I tried to locate it via both freshmeat and google but failed. The trouble with xcolors is that the color map is too long for the screen and there's no available scrolling mechanism. The only way to see the colors that float off the screen is to call xcolors again with a "-start" argument. Paul