Here is the color palette based on your specifications:

json
{
  "palette_name": "Nature's Calm",
  "colors": [
    {
      "name": "Navy Blue",
      "hex_code": "
                            
                            #0A2D51
                        "
    },
    {
      "name": "Slate Blue",
      "hex_code": "
                            
                            #8998B1
                        "
    },
    {
      "name": "Soft Sage Green",
      "hex_code": "
                            
                            #B2C4BC
                        "
    },
    {
      "name": "Pale Sky Blue",
      "hex_code": "
                            
                            #C4DEEB
                        "
    },
    {
      "name": "Olive Green",
      "hex_code": "
                            
                            #637148
                        "
    },
    {
      "name": "Light Pistachio Green",
      "hex_code": "
                            
                            #CEE2B1
                        "
    }
  ]
}

Palette Description:

This palette, named “Nature’s Calm,” features a harmonious blend of blues and greens that evoke tranquility and serenity. The deep Navy Blue anchors the palette, while the lighter shades of Slate Blue and Pale Sky Blue create a refreshing atmosphere. Soft Sage Green and Light Pistachio Green add a subtle touch of nature, complemented by the earthy Olive Green which brings balance.

What do you think of this palette? Would you like to modify any colors or add more?