The young man's hair should not be any color other than black, as specified in the prompt.
The young man should not be wearing any other color of Jiu Jitsu gi or sash other than dark blue and white respectively.
The young man's skin should not be excessively pale or dark, as specified in the prompt.
The young man's eyes should not be any color other than dark, striking eyes, as specified in the prompt.
The young man should not be wearing any jewelry or accessories that are not mentioned in the prompt.
The gym in the background should not include any equipment or objects that do not belong in a typical Jiu Jitsu gym, such as a basketball hoop or a treadmill.
The gym should not be overly cluttered or disorganized, but should appear clean and well-maintained.
The lighting in the image should not be too harsh or artificial, and there should not be any obvious light sources that are not explained by the gym's environment.