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# API - Mar 9, 2026

## Added

### Color customization in the SCA hosted experience

Your platform can now use 2 custom colors in the SCA hosted experience.

Doing so requires 2 actions on your part:

* Define the `PrimaryThemeColour` and `PrimaryButtonColour` hex values by calling the [PUT Update a Client](/api-reference/client/update-client) endpoint (for example, using [Postman](https://www.postman.com/mgp-productstars/workspace/mangopay-sandbox/request/15344095-1416a736-2269-4d3c-89d4-5ff182ca51be)). Note that you need to wait about an hour for the API colors to appear in the SCA session.
* Add the query parameters to the SCA `RedirectUrl` value to use the colors in the session when you [redirect the user](/guides/sca/session):
  * Add `&primary=true` to use the `PrimaryThemeColour`
  * Add `&cta=true` to use the `PrimaryButtonColour`

Note that you need to wait about an hour for the API colors to appear in the SCA session.

If you set only `primary=true`, then the `PrimaryThemeColour` is used for the CTA button as well as the icon accent elements.

If you set only `cta=true`, then the `PrimaryButtonColour` is used for the CTA button and the T\&Cs checkbox, but not the icon accents.

For more information and to see an example, see [SCA customization](/guides/sca/factors#customization) **→**