I'm building an ecommerce site and I've got a white hat question that is probably fairly basic to most of you. I have tons of products and the only differential between some of them is the color. Each product has it's own product page and own url. I kept it that way instead of creating one product with color options so that it looks like i have more products. So if i have 4 product pages with all the same content except the color - is that duplicate content? I can change some of the content but for the features of each product it really is what it is. What percentage of the content would need to be changed on a per page basis so that google does not penalize me for dup content? Also regarding title metatags. Is it ok to have them very similar but only changing the color? IE: "Nice Big Product Blue" "Nice Big Product Red" Thank you for your help.