Here’s a color palette based on your query of gray (gris), red (rojo), black (negro), and white (blanco):

json
{
  "palette_name": "Gris, Rojo, Negro y Blanco",
  "colors": [
    {
      "name": "Gris",
      "hex_code": "
                            
                            #808080
                        "
    },
    {
      "name": "Rojo",
      "hex_code": "
                            
                            #FF0000
                        "
    },
    {
      "name": "Negro",
      "hex_code": "
                            
                            #000000
                        "
    },
    {
      "name": "Blanco",
      "hex_code": "
                            
                            #FFFFFF
                        "
    }
  ]
}

This palette features a balanced combination of neutral and bold colors, providing versatility for various design purposes.

Do you have any specific applications in mind for this color palette, or would you like to explore more colors?