Yo,
I didn't mean the blue background of the dials but the small cream white spots that indicate the numbers 1 - 12...
Anyway see appended picture. It's not very good but I didn't have tools to remove the glass.
If you compare the hour and minute pointers which are white you clearly see that the dial spots have a gray/greenish color. Originally those were the the same color as the pointers.
Actually the same thing happend to my friends SMP earlier this spring after he went to sunny Dubai for a week...
/ Peter