<Jonouchi Katsuya Hair Colors>
1. Dark Brown - 
                            
                            #4B3D3A
                         - A rich, dark brown representing the base color of Jonouchi's hair.
2. Light Brown - 
                            
                            #A46A4A
                         - A lighter brown shade that reflects the highlights seen in his hair.
3. Ash Blonde - 
                            
                            #D6C8A8
                         - A subtle, ashy blonde that captures the lighter tones in certain lighting.
4. Chestnut - 
                            
                            #7C5A4E
                         - A warm chestnut color that adds depth and warmth to the overall palette.
5. Soft Black - 
                            
                            #2C2A27
                         - A deep black that provides a contrast, enhancing the richness of the browns. 

This color palette encapsulates the various shades seen in Jonouchi Katsuya’s hair, illustrating its dark base with lighter and warmer tones for depth and dimension.

Would you like to explore additional palettes related to his character, or perhaps focus on a different aspect like clothing or personality?