Settings › Channels › Website chat controls how the bubble and panel appear. Changes show in the live preview beside the form as you type, and go out to your site when you save.
Your colour
Set your brand colour and the widget uses it for the bubble, the header and your customers’ message bubbles. airys darkens it automatically where text sits on top, so a pale brand colour stays readable.
Nothing here is airys blue unless you leave it that way.
Your greeting
The first line someone reads when they open the panel. One sentence, in your voice: “Ask us anything — we usually reply in a few minutes.”
Keep any promise in it true. A greeting that says “instant reply” on a Sunday you are closed is worse than no greeting.
Where it sits
Bottom right by default; bottom left if that clashes with something else on your site, like a cookie banner.
Your logo and name
Both come from Settings › Brand, so the widget, your help site and your emails stay in step. Change it once there.