The envelope isn’t that obvious anymore as the ‘M’ letter, which obviously hints to Mail, now appears to be displayed on a white background, making the old envelope less visible! How To Get The New Gmail Icon
The red tone is still predominant, while yellow gets the smallest cut of the share.
The popular mail client is now represented by an ‘M’ letter that packs all four colors used by the Google brand: blue, red, yellow and green. Version 04 brings a new look on the Home Screen for Gmail. Gmail for iOS has been updated with a new icon.