Here is a 10-color pastel palette that is subtle and includes all colors of the spectrum, perfect for Excel. Each color is designed to ensure readability and maintain contrast with data.

json
{
  "palette_name": "Subtle Pastel Spectrum",
  "colors": [
    {
      "name": "Pastel Red",
      "hex_code": "
          
          #FFB3B3
       "
    },
    {
      "name": "Pastel Orange",
      "hex_code": "
          
          #FFCCB3
       "
    },
    {
      "name": "Pastel Yellow",
      "hex_code": "
          
          #FFFFB3
       "
    },
    {
      "name": "Pastel Green",
      "hex_code": "
          
          #B3FFB3
       "
    },
    {
      "name": "Pastel Cyan",
      "hex_code": "
          
          #B3FFFF
       "
    },
    {
      "name": "Pastel Blue",
      "hex_code": "
          
          #B3CFFF
       "
    },
    {
      "name": "Pastel Purple",
      "hex_code": "
          
          #D1B3FF
       "
    },
    {
      "name": "Pastel Pink",
      "hex_code": "
          
          #FFB3D1
       "
    },
    {
      "name": "Pastel Mint",
      "hex_code": "
          
          #B3FFE0
       "
    },
    {
      "name": "Pastel Lavender",
      "hex_code": "
          
          #E0B3FF
       "
    }
  ]
}

This palette features soft, pastel shades that cover a range of colors from red to purple, ensuring that they are subtle enough for use in data representation without compromising readability.

Would you like any adjustments to the palette, or do you need help with something else?