Here is a color palette based on your query for 19 shades of blue:

json
{
  "palette_name": "Shades of Blue",
  "colors": [
    {
      "name": "Sky Blue",
      "hex_code": "
                            
                            #87CEEB
                        "
    },
    {
      "name": "Dodger Blue",
      "hex_code": "
                            
                            #1E90FF
                        "
    },
    {
      "name": "Cornflower Blue",
      "hex_code": "
                            
                            #6495ED
                        "
    },
    {
      "name": "Steel Blue",
      "hex_code": "
                            
                            #4682B4
                        "
    },
    {
      "name": "Light Blue",
      "hex_code": "
                            
                            #ADD8E6
                        "
    },
    {
      "name": "Medium Slate Blue",
      "hex_code": "
                            
                            #7B68EE
                        "
    },
    {
      "name": "Royal Blue",
      "hex_code": "
                            
                            #4169E1
                        "
    },
    {
      "name": "Deep Sky Blue",
      "hex_code": "
                            
                            #00BFFF
                        "
    },
    {
      "name": "Navy Blue",
      "hex_code": "
                            
                            #000080
                        "
    },
    {
      "name": "Cyan",
      "hex_code": "
                            
                            #00FFFF
                        "
    },
    {
      "name": "Light Steel Blue",
      "hex_code": "
                            
                            #B0C4DE
                        "
    },
    {
      "name": "Powder Blue",
      "hex_code": "
                            
                            #B0E0E6
                        "
    },
    {
      "name": "Light Cyan",
      "hex_code": "
                            
                            #E0FFFF
                        "
    },
    {
      "name": "Teal",
      "hex_code": "
                            
                            #008080
                        "
    },
    {
      "name": "Medium Blue",
      "hex_code": "
                            
                            #0000CD
                        "
    },
    {
      "name": "Dark Cyan",
      "hex_code": "
                            
                            #008B8B
                        "
    },
    {
      "name": "Turquoise",
      "hex_code": "
                            
                            #40E0D0
                        "
    },
    {
      "name": "Azure",
      "hex_code": "
                            
                            #F0FFFF
                        "
    },
    {
      "name": "Ice Blue",
      "hex_code": "
                            
                            #99CCFF
                        "
    }
  ]
}

This palette features a variety of blue shades, ranging from light and airy tones to deep and rich hues. Each color has its unique charm and can be used in various design applications.

Would you like to explore any specific shades further or need help with something else?