Custom themes are currently not supported for Arduino IDE 2.

Learn how to install a .zip packaged theme for Arduino IDE 1.

1. Open the Sketchbook folder. By default it is located in:

   • Windows: C:\Users\{username}\Documents\Arduino
   • macOS: ~/Documents/Arduino
   • Linux: ~/Arduino

   You can check the location in Preferences, under Sketchbook location:

   • Windows/Linux: File > Preferences
   • macOS: Arduino > Preferences, or Arduino > Settings depending on your macOS version.

   

2. If open, close Arduino IDE.

3. In the sketchbook folder, create a subfolder named theme.

4. Drag and drop the custom theme .zip file into the theme subfolder you created.

   Note: The custom theme must be in the root of the .zip file, NOT in a subfolder.

   • The folder structure should look as follows:

     <Sketchbook folder>
     |_ theme
        |_ MyCoolTheme.zip
           |_ syntax
           |   |_ etc...
           |_ theme.txt
           |_ etc...
     

   • Multiple themes can be installed by adding multiple .zip files and the folder structure should look as follows:

     <Sketchbook folder>
     |_ theme
        |_ MyCoolTheme.zip
        |  |_ syntax
        |  |   |_ etc...
        |  |_ theme.txt
        |  |_ etc...
        |_ MyOtherCoolTheme.zip
           |_ syntax
           |   |_ etc...
           |_ theme.txt
           |_ etc...
     

5. Open the Arduino IDE, select the theme from the Arduino IDE at File > Preferences > Theme menu.

   

6. Restart the Arduino IDE again.