Blue Lucas A blue, 3-column and widget-ready theme by newdirt.org. Also available in silver and white. newdirt
Clear SEO Blue (eng) Just a clear SEO Theme – W3C Valid and easy to edit. For a better Look use the Widget Option of WordPress. charonimo
Bluebird Bluebird is a happy blue and brown, SEO optimized, 3-column, widget-ready theme created for WordPress Randa
Disciple
Soft and clean WordPress theme with 3 columns. Customizable with 4 more colors.