When I create a custom wallpaper image and assign it to the lock screen on iOS 7, the colors of the image are changed. Oddly, if I take a screen capture of the lock screen, the colors match those of the original image.
Is there a way to prevent this? Is it intentional? Perhaps there's something subtle about color management on iOS that I'm missing.
Note: Providing images that document this is (clearly) tricky, but I hope to have some soon. In the meantime, perhaps this is a known issue or feature that someone can help with.