Look at the source, look at the css directory name: blablabla/themes/revol/style.css Google search "revol theme wordpress", say the magic words, and you'll eventually find: http://www.revolutiontheme.com/themes/revolution-magazine If I can do this after half a bottle of whiskey, anyone can.
OP, just look at the stylesheet in future, all turdpress themes have theme information there. http://www.ayushveda.com/magazine/wp-content/themes/revol/style.css