Aren't the red ones moving really fast away from us and the white ones more "stationary" from our point in the universe?
The large white elliptical galaxies in the center of the image are in the "foreground", while the orange-ish galaxies are much farther away in the background. This is why the light from the more distant galaxies is curved and distorted by the foreground objects, creating the lensing effect that we see.