This week’s Friday Focus feature sites that don’t only looks great, but tell you how to build great-looking websites as well!

Happy free 7-11 Slurpy day! Happy iPhone 3G day! Let’s celebrate with some sleek websites this week. They’re mostly blue, gray, blue-gray—that seemingly drab section of the spectrum actually manages to turn up excellent designs, so don’t shun it just yet! Oh, and we have a ton of examples this time, so brace yourself!

Welcome to the first Friday Focus for the month of July. This week: strong bursts of color and collapsible content. Curious combination? Read on!

What’s the lesson for this week? Describe the purpose of your website in one fell swoop and you’ll go a long way. Of course, it helps to have a great design as well.