Hi there, I think it's called wordless by weLaika.
I've just checked themes and it says this theme is active. "This is a vanilla Wordless theme. Use Haml, Sass and Coffescript"
I have an option to Customise - but I'm unsure how to edit from here. it says shift-click to edit, I've tried this but it's not working. I'm on a mac if that helps?