Here’s a more balanced and harmonious color palette with 10 colors that are less clashing, focusing on soft yet vibrant tones that work well together for a casual Excel environment.

json
{
  "palette_name": "Excel Soft Harmony",
  "colors": [
    {
      "name": "Soft Sky Blue",
      "hex_code": "
          
          #A0D9E1
       "
    },
    {
      "name": "Gentle Green",
      "hex_code": "
          
          #A8E6CE
       "
    },
    {
      "name": "Peachy Pink",
      "hex_code": "
          
          #FFABAB
       "
    },
    {
      "name": "Light Lemon Yellow",
      "hex_code": "
          
          #FFF1B5
       "
    },
    {
      "name": "Pastel Purple",
      "hex_code": "
          
          #D6C5E0
       "
    },
    {
      "name": "Mellow Orange",
      "hex_code": "
          
          #FFCCAB
       "
    },
    {
      "name": "Powder Blue",
      "hex_code": "
          
          #B2C8E6
       "
    },
    {
      "name": "Creamy Beige",
      "hex_code": "
          
          #F9E4B7
       "
    },
    {
      "name": "Subtle Coral",
      "hex_code": "
          
          #FF6F61
       "
    },
    {
      "name": "Soft Mint",
      "hex_code": "
          
          #C4E1C1
       "
    }
  ]
}

This palette features Soft Sky Blue for a calm background, Gentle Green for a refreshing feel, and Peachy Pink for a warm touch. Light Lemon Yellow adds brightness without overwhelming, while Pastel Purple provides a gentle contrast. Mellow Orange complements the palette, and Powder Blue adds a soft tone. Creamy Beige serves as a neutral base, Subtle Coral offers a pop of color, and Soft Mint brings in a fresh vibe.

Would you like any further adjustments to this palette, or do you have specific colors you want to explore?