Here is a 13-color palette with significant contrast differences:

json
{
  "palette_name": "High Contrast Spectrum",
  "colors": [
    {
      "name": "Crimson Red",
      "hex_code": "
                            
                            #DC143C
                        "
    },
    {
      "name": "Deep Sky Blue",
      "hex_code": "
                            
                            #00BFFF
                        "
    },
    {
      "name": "Lime Green",
      "hex_code": "
                            
                            #32CD32
                        "
    },
    {
      "name": "Golden Yellow",
      "hex_code": "
                            
                            #FFD700
                        "
    },
    {
      "name": "Royal Purple",
      "hex_code": "
                            
                            #7851A9
                        "
    },
    {
      "name": "Coral Orange",
      "hex_code": "
                            
                            #FF7F50
                        "
    },
    {
      "name": "Slate Gray",
      "hex_code": "
                            
                            #708090
                        "
    },
    {
      "name": "Vivid Teal",
      "hex_code": "
                            
                            #008080
                        "
    },
    {
      "name": "Magenta",
      "hex_code": "
                            
                            #FF00FF
                        "
    },
    {
      "name": "Chartreuse",
      "hex_code": "
                            
                            #7FFF00
                        "
    },
    {
      "name": "Electric Blue",
      "hex_code": "
                            
                            #7DF9FF
                        "
    },
    {
      "name": "Black",
      "hex_code": "
                            
                            #000000
                        "
    },
    {
      "name": "White",
      "hex_code": "
                            
                            #FFFFFF
                        "
    }
  ]
}

This palette includes a variety of vibrant colors alongside neutral tones, ensuring high contrast and visual interest. Would you like to explore themes or specific applications for this palette?