Here’s a color palette that includes your specified color #4F81BD along with three complementary colors that work well for Excel column headings.

json
{
  "palette_name": "Excel Column Headings",
  "colors": [
    {
      "name": "Steel Blue",
      "hex_code": "
          
          #4F81BD
       "
    },
    {
      "name": "Light Gray",
      "hex_code": "
          
          #D9D9D9
       "
    },
    {
      "name": "Medium Sea Green",
      "hex_code": "
          
          #3CB371
       "
    },
    {
      "name": "Tomato",
      "hex_code": "
          
          #FF6347
       "
    }
  ]
}

This palette features a professional blue as the main color, complemented by a soft gray for neutrality, a refreshing green for a touch of vibrancy, and a warm tomato red for emphasis or highlights.

Would you like to adjust any colors or explore additional color combinations?