Here is the revised color palette with 11 colors inspired by the Outlook mail theme, excluding both white and black:

json
{
  "palette_name": "Polished Outlook Mail Theme",
  "colors": [
    {
      "name": "Sky Blue",
      "hex_code": "
                            
                            #0072C6
                        "
    },
    {
      "name": "Light Gray",
      "hex_code": "
                            
                            #F3F3F3
                        "
    },
    {
      "name": "Dark Gray",
      "hex_code": "
                            
                            #3B3B3B
                        "
    },
    {
      "name": "Accent Blue",
      "hex_code": "
                            
                            #005EB8
                        "
    },
    {
      "name": "Soft Green",
      "hex_code": "
                            
                            #A8DAB5
                        "
    },
    {
      "name": "Warm Beige",
      "hex_code": "
                            
                            #F5E1A4
                        "
    },
    {
      "name": "Coral Red",
      "hex_code": "
                            
                            #FF6F61
                        "
    },
    {
      "name": "Slate Blue",
      "hex_code": "
                            
                            #6A9BD1
                        "
    },
    {
      "name": "Muted Lavender",
      "hex_code": "
                            
                            #E0C7E0
                        "
    },
    {
      "name": "Dusk Purple",
      "hex_code": "
                            
                            #5B4B8A
                        "
    },
    {
      "name": "Pale Peach",
      "hex_code": "
                            
                            #F8D5B8
                        "
    }
  ]
}

This polished palette maintains the professional appeal of the Outlook mail theme while removing both white and black, introducing a soft peach to enhance the warmth and variety.

Would you like to explore how to use these colors in design, or do you have any other modifications in mind?