To customise the colours of your pass in the designer, simply click on the theme icon located in the left hand menu. Here, you can choose your desired colours.

The colour palette refers to a set of colors that can be used to customize the appearance of a digital pass.

These are two different ways to represent colors in digital systems

This is the colour that fills the main part of the pass area

This is represents the colour of the field label.

This is represents the colour of the field value text.

If you're using Google Wallet, you only need to provide one colour value and Google will apply a theme for you.

However, with Apple Wallet, you can choose the background colour, label text colour, and value text colour to create a custom theme that suits your needs.

Click on the Google icon in the left menu and click on the theme icon.

Now select the background colour using the colour palette, or adding the HEX/RGB values directly.

Click 'Done" when finished.

Click on the Apple icon in the left menu and click on the theme icon.

Now select the background colour using the colour palette, or adding the HEX/RGB values directly.

Repeat this process for the Label and Text colours and click "Done' when finished. Make sure to click the save icon to save your changes.

Check how your test pass looks after making these changes