Based on your request to update the horror movie palette while maintaining its theme and adapting it for a site background, here’s an updated color palette that works well for that purpose:

1. Crimson Red: #B22222 (a slightly lighter and more vibrant shade of red)
2. Charcoal Black: #1C1C1C (a softer black for better contrast)
3. Deep Purple: #4B0082 (a dark yet vivid purple that adds a pop of color)
4. Muted Gray: #A9A9A9 (a lighter gray for a more subtle background)

Here’s the JSON representation of the updated color palette:

json
{
  "palette_name": "Updated Horror Movie Palette",
  "colors": [
    {
      "name": "Crimson Red",
      "hex_code": "
                            
                            #B22222
                        "
    },
    {
      "name": "Charcoal Black",
      "hex_code": "
                            
                            #1C1C1C
                        "
    },
    {
      "name": "Deep Purple",
      "hex_code": "
                            
                            #4B0082
                        "
    },
    {
      "name": "Muted Gray",
      "hex_code": "
                            
                            #A9A9A9
                        "
    }
  ]
}

This updated palette maintains the horror theme while providing colors that are more suitable for a site background. Would you like any further adjustments or additional colors?