1. Right click on an image 2. Click on "view image" It should then take you to the image, and in the address bar, it should have the location of the image, and which directory the image is located in. Usually, the name of the directory is the name of the WordPress theme I'm just sharing this tip because sometimes people are greedy. When you see someone who has a nice FREE wordpress theme, and ask them, they try and be greedy and won't tell you where to get it. Well atleast in my experience.
I was gonna say "email them" but then I saw what you wrote. In any case, your technique does not work on all themes, especially when most of the styling and image locations are specified in the CSS. So the alternative is do a "view source" of the page and you should see where the CSS is located, which would give the name of the theme.
this is very true tip. yes, even i do search the theme in the same way you described. when we extract the zip file it makes the directory name same to theme name.
Goto website homepage. Right click and choose 'view source'. Press Ctrl+F and find theme .. you will find some code like - wp-content-/themes/xyztheme/.... That xyztheme is the theme you are looking for.