Here is a color palette based on your query featuring dark purple, dark blue, and yellow:

json
{
  "palette_name": "Midnight Sun",
  "colors": [
    {
      "name": "Dark Purple",
      "hex_code": "
          
          #4B0082
       "
    },
    {
      "name": "Dark Blue",
      "hex_code": "
          
          #00008B
       "
    },
    {
      "name": "Yellow",
      "hex_code": "
          
          #FFD700
       "
    }
  ]
}

This palette combines the deep richness of dark purple and dark blue with the vibrant brightness of yellow, creating a striking contrast that is both bold and dynamic.

Would you like to add more colors to this palette or explore different shades?