Here’s a color palette with five shades of yellow that pass AAA contrast against both #222222 and #FEFEFE :

json
{
  "palette_name": "AAA Contrast Yellows",
  "colors": [
    {
      "name": "Golden Yellow",
      "hex_code": "
          
          #FFC300
       "
    },
    {
      "name": "Sunflower Yellow",
      "hex_code": "
          
          #FFDA44
       "
    },
    {
      "name": "Lemon Yellow",
      "hex_code": "
          
          #F6EB61
       "
    },
    {
      "name": "Canary Yellow",
      "hex_code": "
          
          #F6EB61
       "
    },
    {
      "name": "Bright Yellow",
      "hex_code": "
          
          #F9E03B
       "
    }
  ]
}

This palette includes various shades of yellow that maintain high contrast against both specified colors.

Would you like to know more about how to use these colors effectively, or do you have any other specific requests?