Here’s a revised color palette with darker shades for the first two colors while retaining harmony with the yellow:

json
{
  "palette_name": "Deep Twilight",
  "colors": [
    {
      "name": "Dark Violet",
      "hex_code": "
                            
                            #5E4B8A
                        "
    },
    {
      "name": "Navy Blue",
      "hex_code": "
                            
                            #000080
                        "
    },
    {
      "name": "Sunflower Yellow",
      "hex_code": "
                            
                            #FFC300
                        "
    }
  ]
}

In this palette, “Dark Violet” and “Navy Blue” provide deeper, richer tones, while “Sunflower Yellow” adds a vibrant pop of brightness that complements the darker colors beautifully.

Would you like any further adjustments or perhaps a specific use case for this palette?