In case this was missed, here is a picture guide on how you change themes.
It's not finalized but for those who want a more updated look, that is available and here's how you get to it.
Go to your profile and follow these steps:
Click "modify profile" and then 'look and layout"

Click "change"

Scroll down and select the "cake" theme (don't ask me why its called cake cuz I don't know)

Here's what that theme looks like:
