Here is a color palette that transitions from dark red to light red, suitable for an Excel sheet for training programs:

json
{
  "palette_name": "Gradient Reds",
  "colors": [
    {
      "name": "Dark Red",
      "hex_code": "
                            
                            #8B0000
                        "
    },
    {
      "name": "Firebrick",
      "hex_code": "
                            
                            #B22222
                        "
    },
    {
      "name": "Indian Red",
      "hex_code": "
                            
                            #CD5C5C
                        "
    },
    {
      "name": "Light Coral",
      "hex_code": "
                            
                            #F08080
                        "
    },
    {
      "name": "Salmon",
      "hex_code": "
                            
                            #FA8072
                        "
    }
  ]
}

This palette features a range of red tones, starting from a deep dark red and moving to a lighter salmon shade, providing a visually appealing gradient for your training programs.

Would you like any specific adjustments to the palette or additional colors?