An email theme is a reusable brand kit. Define it once and apply it to any campaign or digest, and every send shares the same colours, typography, buttons and footer — no copying header/footer markup between campaigns. Themes are managed under Newsletter › Themes.
Newsletter licence requiredAvailable on sites with the Newsletters licence feature enabled.
The themes manager
The Themes list shows every saved theme with a row of colour swatches for a quick visual scan. Create, edit, duplicate or delete themes from here. Each theme has a Name and an immutable Alias; campaigns reference a theme by id.
What a theme controls
Every value below is emitted as a CSS custom property on the theme shell, with inline-style fallbacks for clients that strip <style> or ignore var(...) (Outlook desktop, older Gmail app), so your branding survives the major email clients.
Colours
| Property | Description |
|---|---|
| Primary | Brand accent colour |
| Background / Text / Link | Body canvas, body copy and hyperlink colours |
| Muted text | Captions, metadata and the preheader preview |
| Border | Cards, containers and table cells |
| Footer background / Footer text | Footer colours, kept distinct from the body |
Typography
| Property | Description |
|---|---|
| Font family | Body font stack |
| Heading font family | Optional — falls back to the body font when empty |
| Heading colour / Heading weight | Heading appearance |
| Base font size / Base line height | Body text size (px) and line height (unitless) |
| Link underline | Whether links are underlined |
Buttons
| Property | Description |
|---|---|
| Background / Text / Border | Button colours |
| Border radius | Corner rounding (px) |
| Padding (vertical / horizontal) | Inner spacing (px) |
| Font weight | Button label weight |
Layout, dividers & images
| Property | Description |
|---|---|
| Content max width | Outer container cap (px) — typically 600 |
| Content padding / Block spacing | Padding inside the container and the vertical gap between blocks (px) |
| Divider colour / thickness / style | Rule appearance (solid, dashed, dotted) |
| Image border radius | Default corner rounding applied to image blocks (px) |
Shell, logo & footer
| Property | Description |
|---|---|
| Logo URL | Logo shown in the theme shell header |
| Footer HTML | CAN-SPAM physical address and legal text, appended after the body |
How a theme is applied
When a campaign references a theme, the renderer wraps the rendered block body inside the theme shell at send time — emitting the values above as --cc-* custom properties on the outer table and as inline attributes on buttons, images and dividers. A campaign with no theme still gets a minimal shell with the unsubscribe footer and sensible defaults, so mail is never unstyled.
Pick a theme from the campaign editor (see Campaigns › Themes). The same theme can be reused across unlimited campaigns and digests.