I've said it before that you must be a really courageous person to use vivid colors predominant on websites rather than desaturated ones and I'm keeping my statement. But for those of you who know you can handle this, I give you a collection of 70 free colorful seamless tileable patterns for you to use on a site's background. Some you can already download as a Photoshop file while others are simply PNG patterns that you can use directly on the site, as gif, of course.