What the color change mean? Is is part of a rebranding, or is it supposed to notify users about some special state of Gmail app?
Is it possible to get back to the original red icon?
Supposedly the developer of the Lab feature, is now favoring blue for Google Apps (G Suite), since most users of G Suite also have a personal (red) account of Gmail too. https://productforums.google.com/d/msg/apps/ZXJvWINKpwI/DIrg7F3FBAAJ