Here is a cute and bright pastel color palette inspired by your request for a Microsoft Excel color theme:

json
{
  "palette_name": "Happy Pastel Theme",
  "colors": [
    {
      "name": "Dark Pastel Blue",
      "hex_code": "
          
          #A2C2E2
       "
    },
    {
      "name": "Dark Pastel Pink",
      "hex_code": "
          
          #EAB8D1
       "
    },
    {
      "name": "Light Pastel Yellow",
      "hex_code": "
          
          #F7E29D
       "
    },
    {
      "name": "Light Pastel Green",
      "hex_code": "
          
          #B3E5B9
       "
    },
    {
      "name": "Accent Pastel Peach",
      "hex_code": "
          
          #F4B7A0
       "
    },
    {
      "name": "Accent Pastel Lavender",
      "hex_code": "
          
          #D6C3E2
       "
    },
    {
      "name": "Accent Pastel Mint",
      "hex_code": "
          
          #B7E1E5
       "
    },
    {
      "name": "Accent Pastel Coral",
      "hex_code": "
          
          #FF6F61
       "
    },
    {
      "name": "Accent Pastel Sky Blue",
      "hex_code": "
          
          #8EB8E5
       "
    },
    {
      "name": "Accent Pastel Lemon",
      "hex_code": "
          
          #F3E5A0
       "
    },
    {
      "name": "Hyperlink Blue",
      "hex_code": "
          
          #A0C4FF
       "
    },
    {
      "name": "Followed Hyperlink Purple",
      "hex_code": "
          
          #B39CD0
       "
    }
  ]
}

This palette features a combination of bright, cheerful pastel colors designed to evoke happiness and positivity, perfect for a fun Excel theme.

Would you like to make any adjustments to this palette or need assistance with something else?