Sasuke is a determined and brave warrior, ready to take on any challenge. His dark hair and eyes are full of strength and courage, which are matched by his jet-black clothing. His blue and white uniform is adorned with the Uchiha clan crest, a proud symbol of his heritage. On his back, Sasuke carries his sword, a reminder of his strength and dedication to his path. In his left hand, he carries a scroll, likely containing some kind of vital information that must be delivered.
For this coloring page, I would suggest using deeper, contrast colors to bring out the more serious nature of our protagonist. Navy and black are popular choices for the uniform, with hints of brighter colors like sky blue to represent the clan's symbol. His hair can be a cool grey-black to contrast with his eyes, which can be deep blue or brown. And the Uchiha crest should be the boldest of all, a bright, proud red against the white background.