Sand - 7:19 pm on Aug 28, 2012 (gmt 0)
Tedster, I mean this point. the variations of colors.
Absolutely. This could be one of your problems, assuming the text remains largely the same from one color page to the next.
I seem to have escaped Panda with this last refresh, and one of the majors things I did was condense these types of pages. I didn't canonical them, though -- instead, I used Zappos as inspiration and reworked the way that the pages work. Now, all colors are accessible through a single URL, and I force users to select their color as part of item selection process on the product page.
Then I 301 redirected all 'color pages' to the root page. I can't promise results, but it seems to have worked for me.