Based on your request for a color palette featuring blue and gray, here is a suggested palette:

json
{
  "palette_name": "Blue and Gray Elegance",
  "colors": [
    {
      "name": "Sky Blue",
      "hex_code": "
                            
                            #87CEEB
                        "
    },
    {
      "name": "Slate Gray",
      "hex_code": "
                            
                            #708090
                        "
    }
  ]
}

This palette combines a bright, refreshing blue with a sophisticated gray, perfect for a modern graphic design logo.

Would you like more color options, or perhaps suggestions on how to use these colors in your design?