Here’s a vibrant highlight color palette that complements the hex code #5155c9 , with a focus on bold and lively colors.

{
  "palette_name": "Vibrant Highlight Palette for 
                            
                            #5155c9
                        ",
  "colors": [
    {
      "name": "Electric Lime",
      "hex_code": "
                            
                            #CCFF00
                        "
    },
    {
      "name": "Vivid Magenta",
      "hex_code": "
                            
                            #FF00B2
                        "
    },
    {
      "name": "Radiant Orange",
      "hex_code": "
                            
                            #FF6A00
                        "
    },
    {
      "name": "Bright Turquoise",
      "hex_code": "
                            
                            #00FFD5
                        "
    },
    {
      "name": "Fuchsia",
      "hex_code": "
                            
                            #FF2D92
                        "
    }
  ]
}

Palette Description:

This vibrant highlight palette is crafted to create an energetic and dynamic feel when paired with #5155c9 . Electric lime adds a shocking brightness, while vivid magenta offers a strong contrast. Radiant orange introduces warmth and excitement, bright turquoise provides a refreshing pop, and fuchsia rounds out the palette with its bold and playful nature.

Would you like assistance with anything else or further customization?