Catching Elephant is a theme for Tumblr.
Please look through all the answers here before asking a question. The same questions keep coming up. A lot of customisation can be done with custom css. Try googling css background for example.Catching Elephant is a theme by Andy Taylor

The theme uses quite a lot of CSS3 which only works in the latest versions of Safari, Chrome and Firefox. But it reverts quite well. As I don’t have a PC (I’m using Litmus for screenshots) I’m not yet 100% on how it works in IE. But it looks ‘fine’ (like dogs balls, but as well as IE’s ever going to do) from the screenshots.
It has been submitted to the Theme Garden and can be installed from here. Feedback, bugs et cetera can be sent to hello@andytlr.com.
The Tumblr ‘portrait’ is a maximum size of 128px. I wanted a 300px image so instead of pulling the ‘portrait’ I’m using the replace image feature. A 300px wide photo can be uploaded via the Appearance tab in Customise. If you do not upload a photo, the layout simply reverts to a version without a photo.

