Here’s a color palette inspired by your query for a clock app featuring green, blue, white, and black:

json
{
  "palette_name": "Clock App Colors",
  "colors": [
    {
      "name": "Vibrant Green",
      "hex_code": "
                            
                            #4CAF50
                        "
    },
    {
      "name": "Sky Blue",
      "hex_code": "
                            
                            #2196F3
                        "
    },
    {
      "name": "Pure White",
      "hex_code": "
                            
                            #FFFFFF
                        "
    },
    {
      "name": "Deep Black",
      "hex_code": "
                            
                            #000000
                        "
    }
  ]
}

This palette combines vibrant green and sky blue for a refreshing look, complemented by pure white for clarity and deep black for contrast.

Would you like to explore more color options, or do you need assistance with something else?