Color Palette for a Halloween Event:

1. Pumpkin Orange
   - Hex code: 
                            
                            #FF6600
                        
   - Palette Description: This vibrant orange hue resembles the color of a ripe pumpkin, adding a festive and energetic touch to your Halloween event. It captures the essence of jack-o'-lanterns and autumnal warmth.

2. Spooky Black
   - Hex code: 
                            
                            #000000
                        
   - Palette Description: A classic Halloween color, black symbolizes mystery, darkness, and the unknown. It sets a haunting and eerie atmosphere, perfect for creating a sense of suspense and excitement during your event.

3. Witchy Purple
   - Hex code: 
                            
                            #9900CC
                        
   - Palette Description: This deep purple shade brings a mystical and enchanting vibe to your Halloween festivities. It represents magic, witchcraft, and a touch of royalty, adding a sense of intrigue and allure to your event's ambiance.

4. Haunted Gray
   - Hex code: 
                            
                            #666666
                        
   - Palette Description: This gloomy gray color evokes a sense of haunted houses and ghostly apparitions, enhancing the spooky atmosphere of your Halloween event. It adds a chilling and mysterious touch, perfect for creating a spine-tingling experience.

5. Midnight Blue
   - Hex code: 
                            
                            #000066
                        
   - Palette Description: This dark blue shade resembling the night sky brings a sense of depth and mysticism to your Halloween palette. It adds a touch of elegance and sophistication while maintaining the haunting theme of the event.

6. Ghoulish Green
   - Hex code: 
                            
                            #00CC66
                        
   - Palette Description: This eerie green hue represents the supernatural and otherworldly elements of Halloween. It adds an element of creepiness and provides a vibrant contrast to the darker colors in the palette, creating a visually captivating experience.

These six colors combined will create a captivating Halloween color palette that captures the essence of the spooky season while adding a touch of excitement and enchantment to your event.