Become Your Fursona’s theme is called Tachycineta. It is a modified version of Clear, by Niyaz. If you would like help implementing it on your own WordPress site, leave a comment.

About the name

Tachycineta is pronounced “tack-ee-sin-e-tuh.” It is a genus of swallows native to the Americas, including the tree swallow, Tachycineta Bicolor. Its root words are tachys, meaning “swift,” and kineo, meaning “move.”

Sources: Wikipedia, Archive.org