Here is an updated color palette with a deeper blue and a more red shade instead of coral:

json
{
  "palette_name": "Vibrant Contrast",
  "colors": [
    {
      "name": "Purple",
      "hex_code": "
                            
                            #552988
                        "
    },
    {
      "name": "Bright Yellow",
      "hex_code": "
                            
                            #FFCE00
                        "
    },
    {
      "name": "Deep Blue",
      "hex_code": "
                            
                            #003DA5
                        "
    },
    {
      "name": "Crimson Red",
      "hex_code": "
                            
                            #DC143C
                        "
    },
    {
      "name": "Lime Green",
      "hex_code": "
                            
                            #32CD32
                        "
    }
  ]
}

In this palette, the blue has been deepened to create a stronger contrast, and the coral has been replaced with a vibrant crimson red for a more striking appearance. Would you like any further adjustments or additional colors?