This question comes up occasionally, while the responses are well intended and offer incite into the basic color, ie: silver, gray or pink, the actual color cannot be accurately given from a picture, it will look different between a pic on the phone compared to a kindle or laptop. If the color is not stock it is even more difficult and is a 'best guess'.
If it is important to know the color/hue then a trip to a body shop that does it's own color matching or an automotive paint supply store, they can computer match and in some cases tell you the name of the color and make/model car/truck if it's a factory color.