> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v24** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/Campaign.BrandGuidelines).

Settings that control the visual appearance of your brand in a campaign's automatically generated assets and formats. Only applicable to Performance Max campaigns.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v24/resources/campaign.proto)

| Fields ||
|---|---|
| ## `accent_color` | `string` The accent brand color, entered as a hex code (e.g., #00ff00). You must provide the accent_color if you provide a main_color. |
| ## `main_color` | `string` The main brand color, entered as a hex code (e.g., #00ff00). You must provide the main_color if you provide an accent_color. |
| ## `predefined_font_family` | `string` The brand's font family. Must be one of the following Google Fonts (case sensitive): Open Sans, Roboto, Montserrat, Poppins, Lato, Oswald, Playfair Display, Roboto Slab. |