Branding your emails
All Eventually emails (confirmations, reminders, broadcasts, and host notifications) carry your brand colors in the header. The brand logo appears only when a logo is attached; otherwise the header shows your brand or sender name. On a dark email background, the logo appears on a light plate so the logo artwork stays visible. You can override the default logo size for emails only, and the header logo automatically links to your brand site when a valid URL is available.
When a configured color does not meet contrast requirements on its background, Eventually automatically substitutes a readable color. This covers headings, body text, subtitles, footer text, and text on accent colors, buttons, and card fills; a configured color that already meets the readability requirement is used as entered. Default email buttons and check marks use a deeper coral fill so their white text stays readable. This applies to attendee and host email text, including join links, Add to Calendar links, contact and transfer links, and the sender name shown when no logo is attached. Customize → Communications includes an Accessibility section with checks for Calendar link, Join link, and Contact & transfer links. These checks report the text attendees actually receive, so a replaced color can pass while the panel shows a hint such as "Auto text replaces accent color" or "Auto text replaces button color".
Set your email logo size
The Logo size control lives in Communications under the Email Styling section. It scales the header logo box in transactional emails without changing the logo used elsewhere.
Go to Customize → Communications in your Eventually dashboard.
Open the Email Styling section.
Choose a Logo size from the dropdown:
Default: Uses the brand default scale (1×).
Small: 0.75× the default box.
Large: 1.5× the default box.
Extra large: 2× the default box.
Save your changes.
Logo size is an email-only override. It does not change the core brand logo used on event pages or the calendar widget.
How the logo link works
When a valid site URL exists, the header logo in transactional emails is wrapped in a link to your brand site.
The link URL is chosen in this order:
Your brand’s source URL (if set).
The connected Squarespace site URL (fallback).
If neither URL is present, or if the URL is malformed or not a valid HTTP(S) address, the logo is displayed as a plain image without a link.
Host notification branding
Host notifications, including new-registration alerts and capacity alerts, carry the same branded header as attendee emails. The subject line and body are generated from the event state, but the header logo, colors, and link match your brand settings.
Capacity alerts trigger when an event reaches 80% or 100% capacity. The subject line shows the live percentage at send time, for example "Event Title is 90% full", or "Event Title is sold out".
The email body includes a progress bar and a View event button styled with your brand colors.
To turn capacity alerts on or off, see Notification preferences.
Related guides
Customize your event emails: Edit templates and merge tags.
Brand settings: colors, logo, and fonts: Set your core brand logo and colors.
Notification preferences: Turn on capacity alerts and other host notifications.