I was thinking about the question states lately.
As a user of SO this is how I see questions:
RED = unanswered
GREEN = answered
I know that SO lists non-accepted-answer questions under the unanswered listing but it's really the colors that make the difference: A red question begs to be answered, a green question shows that somebody already solved the problem
The idea of GREEN/RED is of boolean nature. SOLVED/UNSOLVED, FIXED/BROKEN, etc.
We SO users know that the answering of a question is a process, not the wait for an event to happen (the first answer to arrive, even if it's wrong).
So what I want to propose is a middle step between green and red:
RED = no answers
YELLOW = answered but the most voted answer is still < N (where N is a reasonable number of votes).
GREEN = an answer has < N votes or is accepted
The yellow step will visually tell you that the question is in it's way to be answered, and still encourage you to participate, either by providing a better answer or by voting an existing one.
The counter-argument that will make things more confusing is plain wrong. RED - YELLOW - GREEN is a very well known color scheme for the state of things (like the traffic lights for example).