For clarity, we’re talking here about the Google Search on the web. So, specifically, in a browser. The Google app, found on most Android devices, follows the system-level theme by default. And that is an entirely different process for those who primarily use that app. Or any app. As with many tasks on Android, that also means there are different how-to guides for those types of changes.
Here’s how you can enable dark mode on Google Search via Desktop
It’s worth noting here that, unlike some other changes to enable dark mode, the one for Google Search doesn’t appear to be dependant on the Chrome browser. Namely, this isn’t a change to the app or software itself. That’s because this is a change to the website itself, making it a server-side change. So, regardless of where you choose to “Google” things, this guide should help you make the thematic switch. Although, in some browsers, you’ll need to look for the “gear-shaped icon” at the top-right-hand side of the UI. That’s as opposed to using the “Settings” button in the bottom bar — as shown in our sample images.
…and for mobile or tablets, although results may vary significantly
Now, not every user will be able to instantiate dark mode for Google.com on mobile in Google Chrome or otherwise. Although using the settings to request a desktop page does always show the option in the same settings as on desktop, it doesn’t always appear on the mobile page. Indicating that Google is still testing this feature to some extent. Or, conversely, that this roll-out is happening a bit more slowly. However, once the change does become available, it’s fairly easy to find as well. Provided you know where to look within the mobile app.