Here is a color palette inspired directly by the actual gemstone black tourmaline:

json
{
  "palette_name": "Black Tourmaline Gemstone",
  "colors": [
    {
      "name": "Obsidian Black",
      "hex_code": "
                            
                            #101820
                        "
    },
    {
      "name": "Deep Green",
      "hex_code": "
                            
                            #2C3E50
                        "
    },
    {
      "name": "Metallic Gray",
      "hex_code": "
                            
                            #BDC3C7
                        "
    },
    {
      "name": "Forest Green",
      "hex_code": "
                            
                            #1A2D26
                        "
    },
    {
      "name": "Soft Silver",
      "hex_code": "
                            
                            #EAEDED
                        "
    }
  ]
}

This palette reflects the deep black tones and subtle metallic sheen often seen in black tourmaline, with touches of green and gray to evoke its natural beauty.

Would you like to see variations of this palette or perhaps explore palettes based on other gemstones?