Many Colors for Many Moons... (natural colors; credits: NASA)

Caption NASA:"Four moons huddle near Saturn's multi-hued disk.
The coloration of the planet's northern hemisphere has changed noticeably since the Cassini Spacecraft's arrival in orbit in mid-2004. Imaging scientists are working to understand the causes of this change, which is suspected to be a seasonal effect.

Giant Titan (5150 Km, or approx. 3200 miles across), with its darker Winter Hemisphere, dominates the smaller moons in the scene. Beneath and left of Titan is Janus (181 Km, or about 113 miles across). Mimas (397 Km, or approx. 247 miles across) appears as a bright dot close to the Planet and beneath the Rings. Prometheus (102 Km, or about 63 miles across) is a faint speck hugging the Rings between the two small moons.
This view looks toward the unilluminated side of the Rings from less than 1° above the Ring-Plane.

Images taken using red, green and blue spectral filters were combined to create this natural color view. The view was acquired with the Cassini spacecraft wide-angle camera on Oct. 26, 2007, at a distance of approx. 1,5 MKM (such as about 920.000 miles) from Saturn and 2,7 MKM (about 1,7 MMs) from Titan.
Image scale is roughly 89 Km (approx. 55 miles) per pixel on Saturn and 164 Km (about 102 miles) per pixel on Titan".