Here is a color palette inspired by your request for masculine and dark tones, featuring a dark blue-green color.

json
{
  "palette_name": "Dark Ocean Depths",
  "colors": [
    {
      "name": "Obsidian Black",
      "hex_code": "
                            
                            #1A1A1A
                        "
    },
    {
      "name": "Dark Blue-Green",
      "hex_code": "
                            
                            #004B43
                        "
    },
    {
      "name": "Deep Charcoal",
      "hex_code": "
                            
                            #3B3B3B
                        "
    },
    {
      "name": "Cobalt Blue",
      "hex_code": "
                            
                            #003B5C
                        "
    },
    {
      "name": "Rich Teal",
      "hex_code": "
                            
                            #007B7F
                        "
    }
  ]
}

This palette combines deep, moody colors with a strong dark blue-green that evokes the depths of the ocean, creating a bold and masculine feel.

Would you like any further changes or additional colors in this palette?