Dark mode for Google Chat on web
You can now enable dark mode for Google Chat on the web (chat.google.com) and the Google Chat Progressive Web App (PWA). Dark mode creates a better viewing experience in low-light conditions by reducing brightness and potentially reducing eye strain.
Admins: There is no admin setting for this feature.
End users: Within the chat.google.com or the Google Chat PWA, go to Settings > Theme settings and select “Dark mode”.
Available to all Google Workspace customers, as well as G Suite Basic and Business customers