Dark Theme is a setting that you can toggle in Options. It changes the background colour of your Agar.io game. Instead of the default white grid, the map uses a black grid. It can be better for your eyes, especially when playing at night. You can also use it to reveal players using the Spy skin.
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Trivia[]
- Despite several rumors, the infamous "Spy" skin does not change its color when the Dark Theme is active.
- Some other skins might be more difficult to see while using the Dark Theme.