This theme is tailored specifically for my website; however, you may want to use it for something. Fine by me. Official license or whatever: GNU GPL 3.
Of course, don't use my name if you don't have permission (hint: you don't), unless it's to give me credit for something I made (this theme would qualify).
If you find a security issue or bug in my site, you're welcome to submit an issue here to let me know.