Here are three more color palettes that include #4F81BD along with three other complementary colors for your Excel column headings.

Palette 1: Cool Breeze

json
{
  "palette_name": "Cool Breeze",
  "colors": [
    {
      "name": "Steel Blue",
      "hex_code": "
          
          #4F81BD
       "
    },
    {
      "name": "Powder Blue",
      "hex_code": "
          
          #B0E0E6
       "
    },
    {
      "name": "Light Coral",
      "hex_code": "
          
          #F08080
       "
    },
    {
      "name": "Medium Slate Blue",
      "hex_code": "
          
          #7B68EE
       "
    }
  ]
}

Palette 2: Calm Waters

json
{
  "palette_name": "Calm Waters",
  "colors": [
    {
      "name": "Steel Blue",
      "hex_code": "
          
          #4F81BD
       "
    },
    {
      "name": "Turquoise",
      "hex_code": "
          
          #40E0D0
       "
    },
    {
      "name": "Lavender",
      "hex_code": "
          
          #E6E6FA
       "
    },
    {
      "name": "Peach Puff",
      "hex_code": "
          
          #FFDAB9
       "
    }
  ]
}

Palette 3: Balanced Harmony

json
{
  "palette_name": "Balanced Harmony",
  "colors": [
    {
      "name": "Steel Blue",
      "hex_code": "
          
          #4F81BD
       "
    },
    {
      "name": "Khaki",
      "hex_code": "
          
          #F0E68C
       "
    },
    {
      "name": "Misty Rose",
      "hex_code": "
          
          #FFE4E1
       "
    },
    {
      "name": "Dark Olive Green",
      "hex_code": "
          
          #556B2F
       "
    }
  ]
}

These palettes feature a variety of complementary colors that can provide a fresh and professional look for your Excel column headings. Would you like any further modifications or additional palettes?