Given a number between 1 and 100, return a string containing the color of the number. The color of a number is determined by the following rules. A color is "Red" if it is divisible only by 3 and not by 5. A number is "Yellow" if it is divisible by 5 and not by 3. A number is "Orange" if it divisible by both 3 and 5, and is "Black" if it is not divisible by either 3 or 5. (Credit to Oren).