Theming Material Light

I've been trying to port my website http://ift.tt/1RxIrRw to a more "Google Standard" but it's been really frustrating (thanks to Google, not well documenting stuff, as far as I can see :/).

I've been trying to theme this template: http://ift.tt/1OhBaFO but it isn't going so well. I can't even find how to change the color, which is the most important part.

So, how do I change the purple color to the hex value of #2196f3 ?

Any help would be appreciated. Thanks!