Many like to assume that Uchiha Sasuke's favorite color is something dark, morbid, depressing, or a combination of the three. Many others like to assume that the stoic Uchiha has no favorite color, finding such a trivial thing to be a waste of time. However, both of these opinions are simply untrue.
First of all, Uchiha Sasuke does have a favorite color, surprisingly enough. It's something he doesn't care to broadcast, and is somewhat embarrassed about, but he most certainly does have a favorite color.
Secondly, Uchiha Sasuke's favorite color isn't dark or morbid or depressing, contrary to popular belief. It's a color one would never suspect and wouldn't believe was his favorite if he didn't tell them.
Uchiha Sasuke's favorite color? It's sky blue. No, not because of the vast expanse of open sea above him, or because of the water that reflects said sky. Sky blue is Uchiha Sasuke's favorite color because... it's the color of his eyes.
Those who know him assume that Uzumaki Naruto's favorite color is something happy, merry, joyous, or a combination of the three. Others assume that the loudmouth blond has no favorite color, liking each color equally in their respective surroundings. However, both of these opinions are simply incorrect.
First of all, Uzumaki Naruto does have a favorite color, finding shades of green to be somewhat creepy after seeing Maito Gai and Rock Lee. He used to like all colors equally, but everything changed at a certain point.
Secondly, Uzumaki Naruto's favorite color is not something happy or merry or joyous. His favorite color is one nobody would expect of the blond, especially when taking his cheerful disposition into account.
Uzumaki Naruto's favorite color? It's black. No, not because of the cap he doesn't go to bed without, or because of the ninja tools he fights with. Black is Uzumaki Naruto's favorite color because... it's the color of his eyes.