Google has added another prank to its April Fools' Day playbook by introducing a colorful change to Gmail.

Called Gmail Blue, the search giant's latest effort to revolutionize its email service is as simple as it sounds: to make Gmail the color blue. Everything from the compose button to the font formatting will be blue. As Google's project manager, Richard Pargo, says in the above video: "It's Gmail, only bluer."

Well, not really (in case you're wondering, Gmail is still the same monochromatic interface it's always been). But the announcement, unveiled late Sunday night, makes for a great prank.

Google's video introducing Gmail Blue says it took six years to develop the technology for the color change, and that the company even tried experimenting with different hues, including orange, yellow and brown ("a disaster"). Google adds that the inspiration for blue came from nature — albeit "better than what nature created."

Gmail Blue is the latest in a series of April Fools' Day pranks that Google has foisted on unsuspecting users. There was YouTube shutting down, "Treasure Maps" and Google Nose.

What's your favorite prank from Google? Tell us in the comments, below.

Screenshot image courtesy of Google via YouTube