Match outbound message / posts overlay background to app theme (dark / light mode)

Hi Intercom team 👋

We’ve recently started using Intercom’s outbound messages and are experimenting with the large-format posts. Functionally, they work well but visually, we’re running into a real issue.

Our application is primarily dark-themed. When a large-format outbound message appears, the overlay background is bright white. The contrast is jarring and clashes with the rest of our UI, to the point where it genuinely looks like a mistake or rendering bug.

More importantly, this makes our product feel cheap and unpolished when we use an otherwise powerful Intercom feature. Instead of feeling native, the message feels “bolted on,” which hurts the perceived quality of our app.

What we’d love:
An option for the outbound message overlay background to match the app or user theme:

• Dark overlay for dark mode

• Light overlay for light mode

Even a simple workspace-level or per-message toggle would significantly improve the experience.

This would go a long way toward helping outbound messages feel truly native in modern, dark-first products.

Thanks for considering!