Sorry, we were snoozing! We do try to minimize the number of colors used in each pattern (believe it or not) and actually do a lot of tweaking to remove colors that are close or that are little-used and don't matter. But if we were to produce a pattern that seems to need 120 colors with only 50, say, the result would not be at all the same. Considering that photographs often require millions of colors to reproduce accurately, getting it down to the neighborhood of 100 seems pretty good! For me it isn't so much the total number of colors as how often it's necessary to change colors, and some patterns are much simpler than others. It just depends on the picture.