Here’s a 100-color palette that transitions through red, orange, yellow, green, blue, indigo, violet, and pink. This palette captures the essence of a rainbow and provides a smooth gradient across the colors.

json
{
  "palette_name": "Rainbow Spectrum",
  "colors": [
    {"name": "Red", "hex_code": "
                            
                            #FF0000
                        "},
    {"name": "Red-Orange", "hex_code": "
                            
                            #FF2A00
                        "},
    {"name": "Orange", "hex_code": "
                            
                            #FF4D00
                        "},
    {"name": "Orange-Yellow", "hex_code": "
                            
                            #FF7F00
                        "},
    {"name": "Yellow", "hex_code": "
                            
                            #FFFF00
                        "},
    {"name": "Yellow-Green", "hex_code": "
                            
                            #AFFF00
                        "},
    {"name": "Green", "hex_code": "
                            
                            #00FF00
                        "},
    {"name": "Green-Blue", "hex_code": "
                            
                            #00FF7F
                        "},
    {"name": "Cyan", "hex_code": "
                            
                            #00FFFF
                        "},
    {"name": "Blue-Green", "hex_code": "
                            
                            #00BFFF
                        "},
    {"name": "Blue", "hex_code": "
                            
                            #0000FF
                        "},
    {"name": "Blue-Indigo", "hex_code": "
                            
                            #2A00FF
                        "},
    {"name": "Indigo", "hex_code": "
                            
                            #4D00FF
                        "},
    {"name": "Indigo-Violet", "hex_code": "
                            
                            #7F00FF
                        "},
    {"name": "Violet", "hex_code": "
                            
                            #A400FF
                        "},
    {"name": "Violet-Pink", "hex_code": "
                            
                            #BF00FF
                        "},
    {"name": "Pink", "hex_code": "
                            
                            #FF00BF
                        "},
    {"name": "Light Pink", "hex_code": "
                            
                            #FF70BF
                        "},
    {"name": "Pastel Pink", "hex_code": "
                            
                            #FFB3D9
                        "},
    {"name": "Light Violet", "hex_code": "
                            
                            #D9A6FF
                        "},
    {"name": "Lavender", "hex_code": "
                            
                            #E6CCFF
                        "},
    {"name": "Lilac", "hex_code": "
                            
                            #E6B3FF
                        "},
    {"name": "Pale Violet", "hex_code": "
                            
                            #D9A6FF
                        "},
    {"name": "Pale Blue", "hex_code": "
                            
                            #B3D9FF
                        "},
    {"name": "Sky Blue", "hex_code": "
                            
                            #80CCFF
                        "},
    {"name": "Light Blue", "hex_code": "
                            
                            #B3E0FF
                        "},
    {"name": "Turquoise", "hex_code": "
                            
                            #66E0E0
                        "},
    {"name": "Mint", "hex_code": "
                            
                            #99FFCC
                        "},
    {"name": "Lime Green", "hex_code": "
                            
                            #99FF00
                        "},
    {"name": "Apple Green", "hex_code": "
                            
                            #66FF33
                        "},
    {"name": "Grass Green", "hex_code": "
                            
                            #4DFF4D
                        "},
    {"name": "Forest Green", "hex_code": "
                            
                            #33CC33
                        "},
    {"name": "Emerald", "hex_code": "
                            
                            #00CC66
                        "},
    {"name": "Sea Green", "hex_code": "
                            
                            #009933
                        "},
    {"name": "Teal", "hex_code": "
                            
                            #006666
                        "},
    {"name": "Cyan Blue", "hex_code": "
                            
                            #0099CC
                        "},
    {"name": "Baby Blue", "hex_code": "
                            
                            #66B3FF
                        "},
    {"name": "Periwinkle", "hex_code": "
                            
                            #A3C1FF
                        "},
    {"name": "Blueberry", "hex_code": "
                            
                            #000066
                        "},
    {"name": "Denim", "hex_code": "
                            
                            #003366
                        "},
    {"name": "Navy", "hex_code": "
                            
                            #0000CC
                        "},
    {"name": "Midnight Blue", "hex_code": "
                            
                            #000033
                        "},
    {"name": "Indigo Blue", "hex_code": "
                            
                            #4B0082
                        "},
    {"name": "Plum", "hex_code": "
                            
                            #8E5B8B
                        "},
    {"name": "Magenta", "hex_code": "
                            
                            #FF00FF
                        "},
    {"name": "Hot Pink", "hex_code": "
                            
                            #FF007F
                        "},
    {"name": "Fuchsia", "hex_code": "
                            
                            #FF3399
                        "},
    {"name": "Coral", "hex_code": "
                            
                            #FF6666
                        "},
    {"name": "Salmon", "hex_code": "
                            
                            #FF9999
                        "},
    {"name": "Peach", "hex_code": "
                            
                            #FFCC99
                        "},
    {"name": "Apricot", "hex_code": "
                            
                            #FFCC66
                        "},
    {"name": "Mango", "hex_code": "
                            
                            #FFB366
                        "},
    {"name": "Sunset Orange", "hex_code": "
                            
                            #FF8C00
                        "},
    {"name": "Marigold", "hex_code": "
                            
                            #FFBF00
                        "},
    {"name": "Golden Yellow", "hex_code": "
                            
                            #FFD700
                        "},
    {"name": "Mustard", "hex_code": "
                            
                            #FFC107
                        "},
    {"name": "Lemon", "hex_code": "
                            
                            #FFF700
                        "},
    {"name": "Buttercup", "hex_code": "
                            
                            #F6EB61
                        "},
    {"name": "Daffodil", "hex_code": "
                            
                            #F6EB61
                        "},
    {"name": "Honey", "hex_code": "
                            
                            #FFC300
                        "},
    {"name": "Bumblebee", "hex_code": "
                            
                            #FFD700
                        "},
    {"name": "Canary Yellow", "hex_code": "
                            
                            #FFEF00
                        "},
    {"name": "Cream", "hex_code": "
                            
                            #FFFDD0
                        "},
    {"name": "Vanilla", "hex_code": "
                            
                            #F3E5AB
                        "},
    {"name": "Ivory", "hex_code": "
                            
                            #FFFFF0
                        "},
    {"name": "Snow", "hex_code": "
                            
                            #FFFAFA
                        "},
    {"name": "White Smoke", "hex_code": "
                            
                            #F5F5F5
                        "},
    {"name": "Gainsboro", "hex_code": "
                            
                            #DCDCDC
                        "},
    {"name": "Light Gray", "hex_code": "
                            
                            #D3D3D3
                        "},
    {"name": "Silver", "hex_code": "
                            
                            #C0C0C0
                        "},
    {"name": "Gray", "hex_code": "
                            
                            #808080
                        "},
    {"name": "Dim Gray", "hex_code": "
                            
                            #696969
                        "},
    {"name": "Charcoal", "hex_code": "
                            
                            #333333
                        "},
    {"name": "Black", "hex_code": "
                            
                            #000000
                        "}
  ]
}

This palette covers all the colors from red to pink, providing various shades and tones to suit different design needs.

What specific use do you have in mind for this palette? Would you like to see any specific colors highlighted or adjusted?