Chrome on Android supports this flag. It works pretty well. chrome://flags/#enable-force-dark Also this one chrome://flags/#darken-websites-checkbox-in-theme

Chrome on Android supports this flag. It works pretty well. chrome://flags/#enable-force-dark Also this one chrome://flags/#darken-websites-checkbox-in-themes-setting The UI might even support it. Also this has been asked many times over many years. I just don't think it's going to happen