In addition to the customization options available when you create a ceremony, you can further customize the appearance and behavior of an embedded ceremony. To do this, pass customization options as query parameters in the ceremony URL.

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Appearance

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Accent Color

You can set the accent color of the ceremony using the accent_color query parameter. The accent color appears in interface elements such as buttons and signature places. Make sure the color you choose is visible against a white document background. The value must be a valid hexadecimal color code, without the # prefix. The default accent color is a shade of blue. For example, to set the accent color to purple:
https:​//sign.signatureapi.com/en/start?token=eyJhbGci…iDsInR?accent_color=8e24aa
The ceremony will look like this:
Ceremony UI with purple accent color

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Behavior

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Disable Cancel

As a default, the ceremony allows the recipient to cancel the ceremony. You can disable this by setting the allow_cancel query parameter to false. You can do this to handle the cancellation in your application.
https:​//sign.signatureapi.com/en/start?token=eyJhbGci…iDsInR?allow_cancel=false

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Event Delivery

The ceremony can send events to your application. You can configure the event delivery method by setting the event_delivery query parameter to either redirect or message.

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Javascript Messages

When you set event_delivery=message, the ceremony will send events to your application as a Javascript Message with a payload. This is useful when embedding in a web app using <iframe>.
https:​//sign.signatureapi.com/en/start?token=eyJhbGci…iDsInR?event_delivery=message

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Redirects

When you set event_delivery=redirect, the ceremony will redirect to a URL with a query parameter that contains the event. This is useful when embedding in a desktop or mobile app using WebView or similar.
https:​//sign.signatureapi.com/en/start?token=eyJhbGci…iDsInR?event_delivery=redirect
Learn more about delivering events to your application in Ceremony Events.