Here is a color palette suitable for app design:

json
{
  "palette_name": "Modern App Palette",
  "colors": [
    {
      "name": "Cool Blue",
      "hex_code": "
                            
                            #007BFF
                        "
    },
    {
      "name": "Soft Gray",
      "hex_code": "
                            
                            #F8F9FA
                        "
    },
    {
      "name": "Vibrant Green",
      "hex_code": "
                            
                            #28A745
                        "
    }
  ]
}

This palette includes a vibrant blue for primary actions, a soft gray for backgrounds and subtle elements, and a vibrant green for success messages or accents.

What type of app are you designing?