Here is yet another unique color palette featuring three different colors that do not include green or red, suitable for an engaging action tracker scheme, each at 40% opacity.

json
{
  "palette_name": "Engaging Action Tracker Scheme",
  "colors": [
    {
      "name": "Navy Blue",
      "hex_code": "
          
          #000080
       "
    },
    {
      "name": "Coral Pink",
      "hex_code": "
          
          #FF6F61
       "
    },
    {
      "name": "Lavender",
      "hex_code": "
          
          #E6E6FA
       "
    }
  ]
}

This palette features a classic navy blue, a vibrant coral pink, and a soft lavender, creating an engaging and visually appealing selection for your project tracking.

Would you like the RGB values for these colors or any further variations?