sgsman7, I'm having the same problem!
The screen is doing a weird little flickering and banding of the colors. Extensive searching shows that it's only you and me seeing the problem!
To really see it bad take a photo, or view a photo, with a large area of a solid color. It will appear to have bands of stripes through it, like the colors are reduced to 256.
More details: I tried every possible Display setting and nothing mattered. I could get the weird effect to change slightly by moving my finger across the screen. This tells me it is related to the touch-screen electronics.
UPDATE: I was literally driving to Sprint to exchange it and stopped to have my oil changed. Pulled the phone out and the problem was gone! I cannot reproduce it now at all. Time will tell.