I set about circling all the ones I thought used a lot of different colors, and came up with 34! OK, maybe I'm looking at this from the wrong direction. I thought about it for a while and came up with 2 new "subcategories" within most colorful.
The first award is "The Twelve that uses the most color in her quilts", and that award goes to Diane. Although everyone of us had at least one piece with a rainbow of colors, Diane had several, including "All Togehter Now" in the Community theme, and the wonderful "All Hands" in our "Twelve" theme.
The second category is "Most Colorful Theme", and that award goes to "Twelve". This was really a judgement call on my part, as several themes used a lot of color, but on this theme the variety of colors really stood out, including Gerrie's "The Twelves", Kirsten's "Midway", Terri's "12x12 The Board Game", Deborah's "Seven Houses, 5 Trees", Terry's "Twelfth of Twelve", and Nikki's "The Kissing Number".