Here is a color palette based on various shades of grey, which includes 80 different grey tones:

json
{
  "palette_name": "Shades of Grey",
  "colors": [
    {"name": "Light Grey", "hex_code": "
                            
                            #D3D3D3
                        "},
    {"name": "Silver", "hex_code": "
                            
                            #C0C0C0
                        "},
    {"name": "Dark Grey", "hex_code": "
                            
                            #A9A9A9
                        "},
    {"name": "Dim Grey", "hex_code": "
                            
                            #696969
                        "},
    {"name": "Slate Grey", "hex_code": "
                            
                            #708090
                        "},
    {"name": "Charcoal", "hex_code": "
                            
                            #36454F
                        "},
    {"name": "Ash Grey", "hex_code": "
                            
                            #B2BEB5
                        "},
    {"name": "Gainsboro", "hex_code": "
                            
                            #DCDCDC
                        "},
    {"name": "Smoke Grey", "hex_code": "
                            
                            #7B7B7B
                        "},
    {"name": "Cloud Grey", "hex_code": "
                            
                            #B8B8B8
                        "},
    {"name": "Cool Grey", "hex_code": "
                            
                            #A7A8AA
                        "},
    {"name": "Stone Grey", "hex_code": "
                            
                            #A99F8E
                        "},
    {"name": "Graphite", "hex_code": "
                            
                            #7E7B7A
                        "},
    {"name": "Platinum", "hex_code": "
                            
                            #E5E4E2
                        "},
    {"name": "Shadow Grey", "hex_code": "
                            
                            #8B8B8B
                        "},
    {"name": "Battleship Grey", "hex_code": "
                            
                            #7C7B7A
                        "},
    {"name": "Cinder", "hex_code": "
                            
                            #6D6D6D
                        "},
    {"name": "Iron", "hex_code": "
                            
                            #484848
                        "},
    {"name": "Coal Grey", "hex_code": "
                            
                            #101820
                        "},
    {"name": "Lead", "hex_code": "
                            
                            #4B4B4D
                        "},
    {"name": "Dusty Grey", "hex_code": "
                            
                            #B4B4B4
                        "},
    {"name": "Dove Grey", "hex_code": "
                            
                            #D6D6D6
                        "},
    {"name": "Pewter", "hex_code": "
                            
                            #8C8B7A
                        "},
    {"name": "Misty Grey", "hex_code": "
                            
                            #C6C6C6
                        "},
    {"name": "Pearl Grey", "hex_code": "
                            
                            #E9E9E9
                        "},
    {"name": "Fossil Grey", "hex_code": "
                            
                            #B7B7B7
                        "},
    {"name": "Fog Grey", "hex_code": "
                            
                            #C5C5C5
                        "},
    {"name": "Steel Grey", "hex_code": "
                            
                            #4B5D67
                        "},
    {"name": "Zinc", "hex_code": "
                            
                            #6C6F72
                        "},
    {"name": "Smoke", "hex_code": "
                            
                            #E1E1E1
                        "},
    {"name": "Cement Grey", "hex_code": "
                            
                            #9B9B9B
                        "},
    {"name": "Slate", "hex_code": "
                            
                            #708090
                        "},
    {"name": "Ash", "hex_code": "
                            
                            #B2B2B2
                        "},
    {"name": "Charcoal Grey", "hex_code": "
                            
                            #3A3A3A
                        "},
    {"name": "Graphite Grey", "hex_code": "
                            
                            #3B3B3B
                        "},
    {"name": "Dusk", "hex_code": "
                            
                            #7E7F80
                        "},
    {"name": "Mist", "hex_code": "
                            
                            #C0C0C0
                        "},
    {"name": "Light Ash", "hex_code": "
                            
                            #D1D1D1
                        "},
    {"name": "Fog", "hex_code": "
                            
                            #A5A8A0
                        "},
    {"name": "Cinder Grey", "hex_code": "
                            
                            #878787
                        "},
    {"name": "Lead Grey", "hex_code": "
                            
                            #5B5B5B
                        "},
    {"name": "Onyx", "hex_code": "
                            
                            #353839
                        "},
    {"name": "Pigeon Grey", "hex_code": "
                            
                            #B7B1B1
                        "},
    {"name": "Silver Grey", "hex_code": "
                            
                            #B7B7B7
                        "},
    {"name": "Taupe", "hex_code": "
                            
                            #B5B5A5
                        "},
    {"name": "Dove", "hex_code": "
                            
                            #B8B8C1
                        "},
    {"name": "Cloud", "hex_code": "
                            
                            #E7E8E2
                        "},
    {"name": "Palladium", "hex_code": "
                            
                            #A8A8A8
                        "},
    {"name": "Graphite Blue", "hex_code": "
                            
                            #5B5D67
                        "},
    {"name": "Shadow", "hex_code": "
                            
                            #4C4C4C
                        "},
    {"name": "Pewter Grey", "hex_code": "
                            
                            #8C8C8C
                        "},
    {"name": "Gunmetal", "hex_code": "
                            
                            #4A545D
                        "},
    {"name": "Steel", "hex_code": "
                            
                            #A7A8AA
                        "},
    {"name": "Storm Grey", "hex_code": "
                            
                            #A9A9A9
                        "},
    {"name": "Granite", "hex_code": "
                            
                            #6C6F72
                        "},
    {"name": "Dusk Grey", "hex_code": "
                            
                            #5A5A5A
                        "},
    {"name": "Nickel", "hex_code": "
                            
                            #A8A8A8
                        "},
    {"name": "Slate Blue", "hex_code": "
                            
                            #6D7F90
                        "},
    {"name": "Iron Grey", "hex_code": "
                            
                            #484848
                        "},
    {"name": "Smoke Blue", "hex_code": "
                            
                            #B7C9D8
                        "},
    {"name": "Dove Blue", "hex_code": "
                            
                            #A4B6B0
                        "},
    {"name": "Blue Grey", "hex_code": "
                            
                            #6B7C93
                        "},
    {"name": "Cinder Blue", "hex_code": "
                            
                            #5B5B6C
                        "},
    {"name": "Driftwood", "hex_code": "
                            
                            #A59C8D
                        "},
    {"name": "Stone", "hex_code": "
                            
                            #B2B1A1
                        "},
    {"name": "Fog Blue", "hex_code": "
                            
                            #A9B2B9
                        "},
    {"name": "Dove Grey Blue", "hex_code": "
                            
                            #A6B6B6
                        "},
    {"name": "Dust", "hex_code": "
                            
                            #B0B0B0
                        "},
    {"name": "Pewter Blue", "hex_code": "
                            
                            #A1A8A4
                        "},
    {"name": "Cinder Grey Blue", "hex_code": "
                            
                            #6C6E7A
                        "},
    {"name": "Misty Blue", "hex_code": "
                            
                            #A8A8B0
                        "},
    {"name": "Dusty Blue", "hex_code": "
                            
                            #B7B7BA
                        "},
    {"name": "Cloud Blue", "hex_code": "
                            
                            #C3C3C3
                        "}
  ]
}

This palette includes a rich diversity of greys, from light to dark shades, providing a versatile range for design purposes.

Would you like to explore any specific shades, or do you need help with a different palette?