Keynote Down is a free and clean looking style for the Colloquy IRC client based on a modified version of the Macworld Keynote.
Installation: 1. Unzip the file. 2. Move the file to: ~/Library/Application Support/Colloquy/Styles/ 3. If that folder doesn`t exist, create it. 4. Open Preferences -> Appearance. 5. Select new Style from Default Style drop down. 6. In chat room, use Style drop-down menu in toolbar and re-select Default. 7. If you wish to not use as a default, but in particular rooms, select Style from Style drop-down menu in the toolbar on an as-needed basis.