Here’s a refined color palette featuring even softer pastel colors that would be perfect for your spreadsheet related to a four-year plan for college classes in a science major:

json
{
  "palette_name": "Ultra Soft Pastels",
  "colors": [
    {
      "name": "Soft Sky Blue",
      "hex_code": "
          
          #B7E1F0
       "
    },
    {
      "name": "Soft Mint Green",
      "hex_code": "
          
          #C4E3D4
       "
    },
    {
      "name": "Soft Lemon Yellow",
      "hex_code": "
          
          #F2E7B3
       "
    },
    {
      "name": "Soft Lilac",
      "hex_code": "
          
          #E0C3E7
       "
    },
    {
      "name": "Soft Blush Pink",
      "hex_code": "
          
          #F2D1D6
       "
    }
  ]
}

This palette includes ultra-soft shades of blue, green, yellow, lilac, and pink, providing a gentle and inviting appearance for your spreadsheet.

Would you like any further adjustments or additional color suggestions?