Saturn is an impressive gas giant; its diameter standing at an impressive 120,000 kilometers. Its upper atmosphere is a warm yellow hue, and its lower levels a cold, bluish shade. The pressure at the surface is about 1.5 times that of the Earth, and temperatures can range from an icy -140 degrees Celsius to a balmy +10 degrees Celsius. Saturn doesn't have the same solid surface like the Earth; instead it is believed to have a hot, dense rocky core surrounded by liquid hydrogen and helium, with a ring system. The rings are 280,000 kilometers wide and just ten meters deep, separated by gaps of varying widths.
If you're looking to color Saturn, you'll need plenty of cool colors. Try using blues and purples to capture the cold atmosphere of the planet and the icy blue of the lower levels. Incorporate yellow and yellow-greens to illustrate the warm upper atmosphere. For the rings, try using metallic colors like silver and light grey, with soft oranges and browns to show their rocky structure. Accentuate your colors with touches of pale gold and silver, and use bright whites to highlight the mysterious ring gaps.