If you want to update the frontend color of Vanga AI's "Thank you page" upsell so it fits with your brand's theme, Vanga AI app supports this by updating the theme's color settings of your checkout page.

To update the color of your "Thank you page" upsells such as buttons, you can follow the below steps:

1. Navigate to "Sales Channel" and choose "Online Store."

2. In the sidebar, click on your theme settings.

3. Select "checkout" as the page to edit, which will allow you to modify the frontend color of your thank you page.
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4. Navigate to the "color" section, where you can adjust the color according to your preference.

5. After making the changes, click the "save" button to save your updates.

The color of your "Thank you page" upsell will be changed after saving your progress