Here’s a revised color palette with 13 more harmonious colors that would work well for a timeline project:

json
{
  "palette_name": "Harmonic Timeline",
  "colors": [
    {
      "name": "Soft Lavender",
      "hex_code": "
                            
                            #E6D7E1
                        "
    },
    {
      "name": "Pastel Blue",
      "hex_code": "
                            
                            #A4C8E1
                        "
    },
    {
      "name": "Light Sage",
      "hex_code": "
                            
                            #C1D3B3
                        "
    },
    {
      "name": "Peachy Pink",
      "hex_code": "
                            
                            #F1B2A0
                        "
    },
    {
      "name": "Cream",
      "hex_code": "
                            
                            #FFFDD0
                        "
    },
    {
      "name": "Light Coral",
      "hex_code": "
                            
                            #F08080
                        "
    },
    {
      "name": "Powder Green",
      "hex_code": "
                            
                            #B2E0D2
                        "
    },
    {
      "name": "Soft Mint",
      "hex_code": "
                            
                            #B4E1D4
                        "
    },
    {
      "name": "Pale Peach",
      "hex_code": "
                            
                            #FFDAB9
                        "
    },
    {
      "name": "Sky Blue",
      "hex_code": "
                            
                            #87CEEB
                        "
    },
    {
      "name": "Lavender Mist",
      "hex_code": "
                            
                            #D6C2D2
                        "
    },
    {
      "name": "Warm Sand",
      "hex_code": "
                            
                            #F4E1C1
                        "
    },
    {
      "name": "Gentle Aqua",
      "hex_code": "
                            
                            #A1D6D8
                        "
    }
  ]
}

This palette features softer, more subtle tones that provide a calm and harmonious look, perfect for a timeline project where clarity and elegance are important.

What specific aspects of the timeline project do you want the colors to highlight?