One of the new Gmail themes is available in arcade video games inspired by the 8-bit.
Reminds the graphics of Super Mario Bros.. NES although the background is dark, but that's just because I took the screenshot night. Enter in your Gmail with this issue during the day and see a blue sky 
The originality of Google to score points!
Did I just get into gmail and for that matter, and the sky is dark? = | But it's pretty crazy! =)