Here is a color palette that can be used for a flow diagram, providing a clean and professional look:

json
{
  "palette_name": "Flow Diagram Colors",
  "colors": [
    {
      "name": "Sky Blue",
      "hex_code": "
                            
                            #87CEEB
                        "
    },
    {
      "name": "Grass Green",
      "hex_code": "
                            
                            #32CD32
                        "
    },
    {
      "name": "Sunset Orange",
      "hex_code": "
                            
                            #FF4500
                        "
    },
    {
      "name": "Soft Gray",
      "hex_code": "
                            
                            #D3D3D3
                        "
    },
    {
      "name": "Rich Black",
      "hex_code": "
                            
                            #101820
                        "
    }
  ]
}

Palette Description:

This palette features a combination of soft and vibrant colors that are ideal for creating a clear and visually appealing flow diagram. The Sky Blue and Grass Green provide a calming backdrop, while Sunset Orange can be used to highlight important points. Soft Gray offers neutrality, and Rich Black is perfect for text and outlines.

What specific elements do you want to include in your flow diagram? Do you have any preferences for the layout or style?