Here is a color palette based on your query for blue marine and black:

json
{
  "palette_name": "Marine Night",
  "colors": [
    {
      "name": "Marine Blue",
      "hex_code": "
          
          #007B7F
       "
    },
    {
      "name": "Deep Black",
      "hex_code": "
          
          #000000
       "
    },
    {
      "name": "Sky Blue",
      "hex_code": "
          
          #00A3E0
       "
    },
    {
      "name": "Charcoal Black",
      "hex_code": "
          
          #333333
       "
    },
    {
      "name": "Teal Blue",
      "hex_code": "
          
          #008080
       "
    }
  ]
}

This palette combines the deep richness of black with various shades of blue, evoking a sense of calm and depth reminiscent of the ocean at night.

Would you like to explore more colors or have any specific applications in mind for this palette?