Here’s a pastel color palette that includes a red tone and a seafood green, along with darker contrasting tones for text use:

json
{
  "palette_name": "Pastel Seafood Colors",
  "colors": [
    {
      "name": "Pastel Red",
      "hex_code": "
          
          #FF6F61
       "
    },
    {
      "name": "Pastel Seafood Green",
      "hex_code": "
          
          #77B8A3
       "
    },
    {
      "name": "Pastel Blue",
      "hex_code": "
          
          #A4D7E1
       "
    },
    {
      "name": "Pastel Lavender",
      "hex_code": "
          
          #D6C9E0
       "
    },
    {
      "name": "Pastel Peach",
      "hex_code": "
          
          #FFB299
       "
    },
    {
      "name": "Pastel Yellow",
      "hex_code": "
          
          #FFEA7F
       "
    },
    {
      "name": "Pastel Mint",
      "hex_code": "
          
          #B2E0D2
       "
    },
    {
      "name": "Pastel Coral",
      "hex_code": "
          
          #FF8C69
       "
    },
    {
      "name": "Pastel Lilac",
      "hex_code": "
          
          #E7C9E2
       "
    },
    {
      "name": "Pastel Grey",
      "hex_code": "
          
          #D9D9D9
       "
    },
    {
      "name": "Dark Red",
      "hex_code": "
          
          #A52A2A
       "
    },
    {
      "name": "Dark Green",
      "hex_code": "
          
          #005F55
       "
    },
    {
      "name": "Dark Blue",
      "hex_code": "
          
          #003B5C
       "
    },
    {
      "name": "Dark Purple",
      "hex_code": "
          
          #5B2F91
       "
    },
    {
      "name": "Dark Peach",
      "hex_code": "
          
          #C66E4B
       "
    },
    {
      "name": "Dark Yellow",
      "hex_code": "
          
          #BDAE2D
       "
    },
    {
      "name": "Dark Mint",
      "hex_code": "
          
          #007B5F
       "
    },
    {
      "name": "Dark Coral",
      "hex_code": "
          
          #B04E3A
       "
    },
    {
      "name": "Dark Lilac",
      "hex_code": "
          
          #4B2C4B
       "
    },
    {
      "name": "Dark Grey",
      "hex_code": "
          
          #A6A6A6
       "
    }
  ]
}

In this palette, the first 10 colors are soft and pastel, perfect for Excel spreadsheets. The last 7 colors are darker tones that are text-friendly and provide good contrast against the lighter pastels.

Would you like to modify any colors or add more details to this palette?