Continuing from my previous post regarding the dynamic backgrounds and colours. Starting from version 39 of Chrome on Android (Lollipop) you can also set the toolbar colour. It's easy too. You just need to add a meta tag for theme-color in the head. So now if you're on Android hopefully your toolbar should be not the boring grey. Head over to the htmlrocks.com website for more details.
http://updates.html5rocks.com/2014/11/Support-for-theme-color-in-Chrome-39-for-Android