Mexican Train comes in a light and a dark version, and you can also let it follow whatever your phone or computer is already set to. It’s a setting on your Account page — and in Display settings during a game — and it applies everywhere you’re signed in. Here’s how to change it.

1. Your color theme lives on the Account page, under “Website settings”.

2. Click “Dark” to switch the whole app to a dark background.

3. Everything changes straight away, so you can see how it looks.

4. Click “Light” for the bright version.

5. “System” follows whatever your phone or computer is already set to.

6. Click “Save settings” to keep your choice.

7. That’s it — you can change it again whenever you like.