Some people might like to have this problem with their game, not me. Very quickly after the sim gets tired it's restored to green. And of course that applies to all of his needs.
I don't know what caused the problem but I do know that I do not want this change in my game to continue. Time goes so much slower now let alone there aren't many challenges to the game which makes it a bit boring.
Right before this happened I do remember getting one of those messages in the upper right hand corner of the screen. Because I was so involved in completing something I deleted it before I read it. He bought a lottery ticket before the problem started. Do you think that maybe he won a consolation prize?
A message was posted on The Sims 3 website in Technical Problems and I haven't gotten any replies. Hopefully I will be able to get an answer from this site.