http://www.newsweek.com/neptune-real-color-uranus-space-1857790

Neptune, one of our most distant planetary neighbors, may not be the color we've always thought it was.

Previous images of far-off planets showed Neptune as being a deep electric blue, while Uranus appeared a sea-foam green. However, new images have revealed that the two planets are, in fact, much more similar in color to each other.