I think this image is cool because everyhthing is black and white but the images inside the glasses which make that the focal point. The artist did this on purpose so the first thing you look at is the glasses . 

Everything is fairly the same color except the bottle which is at the middle. This catches your eye. The person in the white also stands out very well with the gold visor  as the focal point

This image is cool because the background is blurry and the car is the center piece. The tires pop out because its a vibrant color compared to the rest of the image.

The front shoe is more clearer than the back one therefor showing more detail. The black contrasts with the brown of the wood, and everything is well spaced.

This is an image of 2 NFL players who were college teammates and now rivals in the NFL. The white uniforms make the helmets pop out and make them look like teammates again.