A theme for Adium (Empathy, on Linux) that use the original Elementary theme for Adium but with orange decorations.
This theme is based on Elementary OS work, as you can see in this old post "Sneak Peek of Postler (+ an Empathy theme)".
Clone/Download the code and copy the "UbuntuElementary.AdiumMessagesStyle" folder to /usr/share/adium/message-styles.