Here’s an autumn-themed color palette with a darker background and lighter table colors that enhance readability:

json
{
  "palette_name": "Autumn Contrast",
  "colors": [
    {
      "name": "Charcoal Black",
      "hex_code": "
                            
                            #333333
                        "
    },
    {
      "name": "Soft Pumpkin",
      "hex_code": "
                            
                            #FFB84D
                        "
    },
    {
      "name": "Light Maple Brown",
      "hex_code": "
                            
                            #CFAF8D
                        "
    },
    {
      "name": "Creamy Yellow",
      "hex_code": "
                            
                            #FFF5B4
                        "
    },
    {
      "name": "Muted Olive Green",
      "hex_code": "
                            
                            #A2B55C
                        "
    }
  ]
}

This palette features a dark charcoal background for contrast, paired with soft and light colors for tables and text, making it easy to read while maintaining an autumn feel. Would you like tips on how to implement this in your spreadsheet, or do you have other requests?