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?