Here is a color palette inspired by your description of “de rouge vermillon cadmium rougeâtre à caput mortuum très éclatant”:

json
{
  "palette_name": "Vermilion to Bright Caput Mortuum",
  "colors": [
    {
      "name": "Cadmium Vermilion",
      "hex_code": "
                            
                            #D52B1E
                        "
    },
    {
      "name": "Reddish Cadmium",
      "hex_code": "
                            
                            #E03C31
                        "
    },
    {
      "name": "Crimson Red",
      "hex_code": "
                            
                            #B22222
                        "
    },
    {
      "name": "Bright Caput Mortuum",
      "hex_code": "
                            
                            #7E4B8A
                        "
    },
    {
      "name": "Deep Maroon",
      "hex_code": "
                            
                            #4B2C2C
                        "
    }
  ]
}

This palette transitions from the vibrant cadmium vermilion through various shades of red, leading to the rich and striking tones of bright caput mortuum, creating a bold and dramatic color scheme.

What kind of project or artwork do you envision using this color palette for?