Precision M6400: Is my mind or my screen going crazy?

Starting two days ago, I am experiencing an ongoing strange phenomen on my DELL Precision M6400:
Some bright colors started to look not only bright, but kind of "fluorescent".
Just as if the colors (boxes, text, icons ...) had been painted with a fluorescent text marker.

I am not sure if this is a technical phenomenon... I asked some co-workers, some of them told me they are seeing nothing special, one other said the bright colors do look indeed fluorescent.

This phenomenon is limited to bright colors, but not all bright colors look fluorescent.

Anybody else ever experienced this phenomen?
Is my screen going crazy or my eyes?

 

Have you tried connecting the laptop to an external monitor to see if the same thing happens? If you have next-business-day on-site warranty, I suppose it wouldn't hurt to RMA the LCD.