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
It’s a little strange. Because they did say they were going to do it to all the featured themes. But also that if a theme didn’t have the attribution code that the source would go at the bottom of the post. But neither seem to be happening.
In regards to the colour of the logos. I can’t see anything in the help docs yet about attribution. But there is the post on the staff blog. In your example the logo is black. On the dashboard the logo is grey. In the example code in that blog post it appears to be grey but the code says {BlackLogoURL} the same as yours. It may be like the audio posts where there is black, grey and white. Try changing it to {WhiteLogoURL} and see if it changes.