Overall this is a fairly simple and straight forward design, but the diagonal lines make it stand out for me. I could take or leave the magenta color but I like the blue and light blue.
Mastering Grids in UI Design: The Backbone of Visual Harmony
A modern guide to UI design grids, learn how to build flexible 12-column and 4-column systems, master margins, gutters, and modules, and apply today’s responsive layout best practices.
It’s nice. Some very cool HTML5 stuff on there.