Theming

Customize the builder UI using primaryColor and CSS variables.

You can customize the builder primary theme color using primaryColor.

Primary color

<EmailBuilder token="..." primaryColor="#E11D48" />

This updates the CSS variable:

--color-builder-primary: #E11D48;

const BRAND_PRIMARY = "#2563EB";
<EmailBuilder token="..." primaryColor={BRAND_PRIMARY} />

Uploads

Handle image uploads and return public URLs back to the builder.

Security

Practical recommendations for tokens, uploads, and safe usage in production.