**Color Palette: "Mario's Infernal Showdown"**

1. **Fiery Red**
   - **Hex Code:** 
                            
                            #FF3B30
                        
   - **Description:** A vibrant, intense red that symbolizes the heat of hell and the urgency of confrontation. It captures the fiery essence of the underworld.

2. **Inferno Orange**
   - **Hex Code:** 
                            
                            #FF6F20
                        
   - **Description:** A bold and dynamic orange that evokes flames and danger, perfect for the chaotic atmosphere of a boss battle in a hellish setting.

3. **Dark Lava Black**
   - **Hex Code:** 
                            
                            #2C2A29
                        
   - **Description:** A deep, rich black reminiscent of molten rock and shadows, providing a stark contrast to the fiery colors and representing the ominous nature of the boss fight.

4. **Ghostly Green**
   - **Hex Code:** 
                            
                            #A5D76E
                        
   - **Description:** A ghostly green that adds an eerie, supernatural element to the palette, echoing the presence of spirit enemies and the otherworldly setting.

5. **Spectral Purple**
   - **Hex Code:** 
                            
                            #6F2C91
                        
   - **Description:** A mystical purple that conveys a sense of magic and darkness, representing the unknown forces at play in this hellish realm.

6. **Golden Power-Up**
   - **Hex Code:** 
                            
                            #FFD700
                        
   - **Description:** A bright, shiny gold that symbolizes hope and power, reminiscent of Mario's power-ups that provide strength in the face of overwhelming odds.

**Palette Description:** 
This color palette captures the essence of a dramatic confrontation in the underworld, blending fiery hues with darker tones to reflect the intense action and supernatural elements of a Super Mario Bros boss battle in hell. The vibrant colors evoke urgency and danger, while the contrasting dark shades provide depth, creating an engaging and immersive visual experience that resonates with the iconic game’s themes.