A lot of people don't know this but the casinos actually apply a light blueish-green tint to the $100s. They've found people just really like their greenbacks.
Then along comes a guy like Singer and hits em for 3 million or whatever and they all at once got to get the money out the door because the man's son took time off from work to help him carry 10 pounds of paper out the front door and home.
That explains the funny color of the money in the safe.