If you’re one of the lucky ones with access to Google’s new invite-only email client Inbox, you might be seeing some changes in the visuals. Those who already have Android 5.0 Lollipop-powered will see that the status bar color changes to fit the action bar color. The action bar (for all using Inbox) is also now covered by the slide-out navigation menu. And you can now switch accounts by just swiping from the left to bring out the panel and then swipe again.
Source: XDA-Developers