Here is a high contrast color palette suitable for an Excel dashboard:

json
{
  "palette_name": "High Contrast Dashboard",
  "colors": [
    {
      "name": "Bright Blue",
      "hex_code": "
                            
                            #007BFF
                        "
    },
    {
      "name": "Vivid Orange",
      "hex_code": "
                            
                            #FF5722
                        "
    },
    {
      "name": "Lime Green",
      "hex_code": "
                            
                            #4CAF50
                        "
    },
    {
      "name": "Fuchsia Pink",
      "hex_code": "
                            
                            #D5006D
                        "
    },
    {
      "name": "Bright Yellow",
      "hex_code": "
                            
                            #FFEB3B
                        "
    }
  ]
}

This palette features vivid colors that stand out against each other, ensuring high visibility and readability in your Excel dashboard.

Would you like to explore any specific tones or variations for your dashboard, or do you need additional guidance on using these colors effectively?