Here is a color palette featuring 70 shades of blue, each with a unique name and hex code:

json
{
  "palette_name": "70 Shades of Blue",
  "colors": [
    {"name": "Sky Blue", "hex_code": "
          
          #87CEEB
       "},
    {"name": "Dodger Blue", "hex_code": "
          
          #1E90FF
       "},
    {"name": "Steel Blue", "hex_code": "
          
          #4682B4
       "},
    {"name": "Light Sky Blue", "hex_code": "
          
          #87CEFA
       "},
    {"name": "Deep Sky Blue", "hex_code": "
          
          #00BFFF
       "},
    {"name": "Royal Blue", "hex_code": "
          
          #4169E1
       "},
    {"name": "Medium Blue", "hex_code": "
          
          #0000CD
       "},
    {"name": "Dark Blue", "hex_code": "
          
          #00008B
       "},
    {"name": "Navy", "hex_code": "
          
          #000080
       "},
    {"name": "Slate Blue", "hex_code": "
          
          #6A5ACD
       "},
    {"name": "Light Steel Blue", "hex_code": "
          
          #B0C4DE
       "},
    {"name": "Powder Blue", "hex_code": "
          
          #B0E0E6
       "},
    {"name": "Light Blue", "hex_code": "
          
          #ADD8E6
       "},
    {"name": "Alice Blue", "hex_code": "
          
          #F0F8FF
       "},
    {"name": "Cyan", "hex_code": "
          
          #00FFFF
       "},
    {"name": "Electric Blue", "hex_code": "
          
          #7DF9FF
       "},
    {"name": "Sky Blue", "hex_code": "
          
          #87CEEB
       "},
    {"name": "Turquoise", "hex_code": "
          
          #40E0D0
       "},
    {"name": "Teal", "hex_code": "
          
          #008080
       "},
    {"name": "Medium Turquoise", "hex_code": "
          
          #48D1CC
       "},
    {"name": "Dark Turquoise", "hex_code": "
          
          #00CED1
       "},
    {"name": "Light Cyan", "hex_code": "
          
          #E0FFFF
       "},
    {"name": "Light Slate Blue", "hex_code": "
          
          #8470FF
       "},
    {"name": "Cadet Blue", "hex_code": "
          
          #5F9EA0
       "},
    {"name": "Dark Slate Blue", "hex_code": "
          
          #483D8B
       "},
    {"name": "Medium Slate Blue", "hex_code": "
          
          #7B68EE
       "},
    {"name": "Light Blue", "hex_code": "
          
          #ADD8E6
       "},
    {"name": "Blue", "hex_code": "
          
          #0000FF
       "},
    {"name": "Medium Aquamarine", "hex_code": "
          
          #66CDAA
       "},
    {"name": "Dark Cyan", "hex_code": "
          
          #008B8B
       "},
    {"name": "Light Sea Green", "hex_code": "
          
          #20B2AA
       "},
    {"name": "Aqua", "hex_code": "
          
          #00FFFF
       "},
    {"name": "Dark Blue", "hex_code": "
          
          #00008B
       "},
    {"name": "Bright Blue", "hex_code": "
          
          #007FFF
       "},
    {"name": "Ice Blue", "hex_code": "
          
          #99CCFF
       "},
    {"name": "Blue Violet", "hex_code": "
          
          #8A2BE2
       "},
    {"name": "Cornflower Blue", "hex_code": "
          
          #6495ED
       "},
    {"name": "Light Royal Blue", "hex_code": "
          
          #0071C5
       "},
    {"name": "Pastel Blue", "hex_code": "
          
          #A0C4FF
       "},
    {"name": "Ocean Blue", "hex_code": "
          
          #0077BE
       "},
    {"name": "Cerulean", "hex_code": "
          
          #007BA7
       "},
    {"name": "Bright Sky Blue", "hex_code": "
          
          #00A3E0
       "},
    {"name": "Zaffre", "hex_code": "
          
          #0018A8
       "},
    {"name": "Azure", "hex_code": "
          
          #F0FFFF
       "},
    {"name": "Deep Blue", "hex_code": "
          
          #0000A0
       "},
    {"name": "Periwinkle", "hex_code": "
          
          #CCCCFF
       "},
    {"name": "Blue Green", "hex_code": "
          
          #0D98BA
       "},
    {"name": "Dark Azure", "hex_code": "
          
          #00539C
       "},
    {"name": "Vivid Sky Blue", "hex_code": "
          
          #00CCFF
       "},
    {"name": "Celeste", "hex_code": "
          
          #B2FFFF
       "},
    {"name": "Light Cobalt Blue", "hex_code": "
          
          #A4C8E1
       "},
    {"name": "Glacial Blue", "hex_code": "
          
          #A8D8EA
       "},
    {"name": "Blueberry", "hex_code": "
          
          #7D99B8
       "},
    {"name": "Cobalt Blue", "hex_code": "
          
          #0047AB
       "},
    {"name": "Sapphire", "hex_code": "
          
          #0F52BA
       "},
    {"name": "Maya Blue", "hex_code": "
          
          #73C2FB
       "},
    {"name": "Sky Blue", "hex_code": "
          
          #87CEEB
       "},
    {"name": "Light Azure", "hex_code": "
          
          #A0D7E8
       "},
    {"name": "Teal Blue", "hex_code": "
          
          #367588
       "},
    {"name": "Glacier Blue", "hex_code": "
          
          #A3D5E0
       "},
    {"name": "Robin's Egg Blue", "hex_code": "
          
          #1F9F9D
       "},
    {"name": "Blue Lagoon", "hex_code": "
          
          #008CBA
       "},
    {"name": "Cyan Blue", "hex_code": "
          
          #0095D9
       "},
    {"name": "Air Force Blue", "hex_code": "
          
          #5D8AA8
       "},
    {"name": "Light Cornflower Blue", "hex_code": "
          
          #8BB2E0
       "},
    {"name": "Dark Cerulean", "hex_code": "
          
          #08457E
       "},
    {"name": "Violet Blue", "hex_code": "
          
          #8A00B8
       "},
    {"name": "Aero", "hex_code": "
          
          #7CB9E8
       "},
    {"name": "Dark Sapphire", "hex_code": "
          
          #1D3F72
       "},
    {"name": "Frostbite", "hex_code": "
          
          #E8B2C3
       "},
    {"name": "Brisk Blue", "hex_code": "
          
          #A0D8E0
       "},
    {"name": "Cool Blue", "hex_code": "
          
          #B2C2D4
       "},
    {"name": "Pacific Blue", "hex_code": "
          
          #009CBB
       "},
    {"name": "Ultramarine", "hex_code": "
          
          #3F00FF
       "},
    {"name": "Blueberry Pie", "hex_code": "
          
          #A9C1D9
       "},
    {"name": "Dawn Blue", "hex_code": "
          
          #A3D9E2
       "},
    {"name": "Wedgewood Blue", "hex_code": "
          
          #4B9CD3
       "},
    {"name": "Bright Azure", "hex_code": "
          
          #007FFF
       "},
    {"name": "Lapis Lazuli", "hex_code": "
          
          #26619C
       "},
    {"name": "Dark Blue Gray", "hex_code": "
          
          #1F3A3D
       "},
    {"name": "Cerulean Frost", "hex_code": "
          
          #A4D7E1
       "},
    {"name": "Blue Ash", "hex_code": "
          
          #0090A8
       "},
    {"name": "True Blue", "hex_code": "
          
          #3D5AFE
       "},
    {"name": "Vivid Blue", "hex_code": "
          
          #3B91B5
       "},
    {"name": "Sky Blue Pink", "hex_code": "
          
          #D6B1E5
       "}
  ]
}

This palette features a wide range of blue shades, from light pastels to dark, deep hues. It can be used for various design projects, including web design, branding, and interior decor.

Is there a specific context or application you have in mind for these colors?