Web design with seo in mind means clean code and light page weights. Too many images will slow down your page load times and can lower your Google rank in search results. Use CSS3 for boxes, borders, buttons… thousands of household uses. Check the blue bars and action buttons, gradients and drop shadows at nickswebworks.com. These were all designed using Colorzilla for Firefox. This is important not only for visual appeal but also to get the most from your search engine optimization (seo) for your web design.
Contact me for any questions regarding this and other web design tools. I hope to have useful tutorial posted soon.