Color-corrected and sharpened image of comet 67P by Reditter IG-64. Original image credit: ESA/Rosetta/OSIRIS.

Most images taken of comet 67P/Churyumov–Gerasimenko have been in greyscale. This is the first true color image of the comet, taken with Rosetta’s OSIRIS camera.

Source: The first true color image of comet 67P taken by the Rosetta spacecraft.

Rosetta images of comet 67P on Flicker: https://www.flickr.com/photos/europeanspaceagency/sets/72157638315605535/