Tevwa – A Twenty Eleven child theme for WordPress by Martin Burne, set to a width of 1600. To install it on your self-hosted blog, unzip and upload the tevwa folder into your wp-content/themes folder.
And to go with it, five headers set to the suggested dimensions of 1600×350. Take them for a spin!
Finally, if you check the style.css of Tevwa, you’ll find a line which allows you to customise the background of your page content. Or you can delete/comment that out to choose between the standard dark and light colour schemes.