This style was created because to prevent eye-strain while chatting with plus.im during the night. It was created in 10 minutes. Why it was created, because there was no other night mode style! Sorry for the poor description and no screenshots. Chats are private. :/
Update1: brightened the links and nicks for better look! Thinking to add visited links color?

Be sure to check Disconcerting's theme of plus.im it is darker than mine and better looking. Link: http://freestyler.ws/style/85034/plus-im-dark-theme-0-6