Update 9/5: The Material You redesign of Gmail for Android is rolling out with version 2021.08.24.394054613 — not 2021.08.24.394054657 as was previously widely linked to. For some reason, this revamp is not enabled with the absolute latest release of Gmail, but the version just before that. In our testing, installing 13 consistently results in the new look. It also works on Android 11 devices we tested, though with blue hues leveraged instead of Dynamic Color.
Gmail on the web is getting a navigation refresh this summer, and the Android app is getting a Material You makeover. 9/16 update: Gmail’s Material You revamp went live this evening as version 2021.08.24.396045863. It’s showing up in the Google Play Store for phones running Android 10, and potentially older. Check out the redesigned widget as well. It’s still a simple list, but the compose button in the top-right corner has been upgraded to a regular FAB. It, like “Inbox” and other top-level items, uses Dynamic Color theming on Android 12, but is blue on all other releases.
Original 9/2: It starts on the homescreen, with the top of the page seeing a pill-shaped search field that features a hamburger icon on the left and profile avatar/account switcher at the other end that fits the curvature. The layout of the navigation drawer is unchanged with this revamp, while various buttons in Gmail are now rounded. At the bottom, we get a taller bottom bar — like we enabled in Google Play — that makes use of a pill-shaped indicator to highlight what tab you’re currently viewing. The selected icon is also filled out, while Gmail leverages a rectangular “Compose” FAB just above it — similar to the one in Google Contacts. That element shrinks to just the icon as you scroll down.
The other big change today is the use of Dynamic Color to hue the background of Gmail for Android. This includes the main email list, all tabs, and the compose screen. The bottom bar, search field, and buttons leverage a darker shade, while the overflow menu also sees some theming. This update also renames “Rooms” to “Spaces” — as expected — in the bottom bar. 2021.08.24.394054613, as spotted by Artem Russakovskii and XDA this morning. Sideloading does not guarantee you’ll see these changes as there is a server-side component, but you might get lucky.