I bet a really nice logo would really add to your site, and it would bring some more color to your site. Look into getting a logo designed professionally. Show the designer your Web site and your motto “because it’s hip to do squares.”
JPnyc means that there should be more color on each page, not to change the color scheme on each category. Changing the color scheme on each category page might confuse some of your customers, they may think they went to a different Web site. Here is a great online tool to help you with a color scheme...