Ok Google, where is my Dark theme toggle for Gmail - Android

Google has been adding Dark theme to most of its core Android apps. This setting changes the usual dark text on a white background to white text on a black or gray background. The idea behind Dark theme is to protect the eyes of users and bystanders from the retina melting white background at night or in a dark room. And with a black background, Dark theme can also save a little battery life on devices using an AMOLED screen. That's because these displays create the color black by turning off pixels in the appropriate area of the screen. Pixels that are turned off do not draw power from the ...