Omen — Adium message style 30 Nov 2014
This is a theme I’ve personally used for a few years before deciding to polish and share it. It’s built for customization, particularly different background colors and fonts. Included is a light variant (dark text for light backgrounds), dark variant (light text for dark backgrounds), and compact variants of those two (for people who don’t have the screensize for the theme’s liberal padding and white space).
(I personally recommend Verlag Condensed 16 for the custom font—shame it’s not a system font.)
You can download Omen from the Adium Xtras here.