I've seen the same planet colored differently in different photos. Here are the true colors of major planets to the best of my knowledge (spacecraft photos appearing in the media often have false coloration): Mercury: grey; Mercury has practically no atmosphere, so we just see the rocky surface.
Sitting for hours can cause poor circulation which is a major cause of the heavy legs syndrome and if there no underlying medical condition and the feeling worsens when walking upstairs, then curiously enough, you might like to look at your diet for clues.
Lately, I've had a lot of leg pain, especially when sitting at my desk or standing in line at the store. Should I be concerned about this new aching? Answers from Sheldon G. Sheps, M.D. New, persistent leg pain certainly warrants a visit to your doctor for evaluation. Leg pain can have many causes, but your description of aching after prolonged standing or sitting suggests a possible buildup of fluid in the leg veins (venous congestion). Venous congestion occurs when the valves in your leg veins don't work properly to keep blood moving efficiently from your legs to your heart.