Here is a color palette inspired by your description of “de rose-rouge à bleu klein alizarine”:

json
{
  "palette_name": "Rose Red to Klein Blue",
  "colors": [
    {
      "name": "Rose Red",
      "hex_code": "
                            
                            #C72C41
                        "
    },
    {
      "name": "Crimson",
      "hex_code": "
                            
                            #DC143C
                        "
    },
    {
      "name": "Magenta",
      "hex_code": "
                            
                            #FF00FF
                        "
    },
    {
      "name": "Klein Blue",
      "hex_code": "
                            
                            #003DA5
                        "
    },
    {
      "name": "Deep Blue",
      "hex_code": "
                            
                            #002D72
                        "
    }
  ]
}

This palette creates a vivid transition from the warm and passionate tones of rose red through vibrant magenta, culminating in the striking and bold shades of Klein blue, resulting in a dynamic and energetic color scheme.

What kind of project or design do you plan to use this color palette for?