One of the coolest feature of Gmail is its customisable themes. Gmail has introduced a new theme which has a color scheme as that of the new Google+. Last week Google applied the same color scheme to google.com ,which is by the way pity awesome. This is theme is sleeker, elegant.
Now you can get Gmail in a total new look similar to that of Google+. All you have to do is to go to Gmail Settings -> Themes and then select either Preview or Preview(Dense). Refresh your gmail and it’s done.