My Nexus 5 recently got updated to Android 5.0 Lollipop. It's a nice update, I really like the design.
I was browsing some websites and one website had a custom colour in the chrome nav bar. I thought that was so cool, so I had to find out how to do it. It's super easy, you just put a meta tag in the <head> of your site:
<meta name="theme-color" content="#1b1b1b" />
It takes your website from this:
To a snazzy looking this:
It also affects the app switcher view. Here is a before and after: