Here is a color palette based on your query for a golden/yellow theme with good accessibility properties:

json
{
  "palette_name": "Accessible Golden Yellow",
  "colors": [
    {
      "name": "Bright Yellow",
      "hex_code": "
          
          #FFEA00
       "
    },
    {
      "name": "Golden Yellow",
      "hex_code": "
          
          #FFD700
       "
    },
    {
      "name": "Light Golden Yellow",
      "hex_code": "
          
          #FFFACD
       "
    },
    {
      "name": "Mellow Yellow",
      "hex_code": "
          
          #F6EB61
       "
    },
    {
      "name": "Dark Golden Yellow",
      "hex_code": "
          
          #B8860B
       "
    }
  ]
}

This palette includes a range of yellow tones that maintain high visibility and contrast, making them suitable for maps while being accessible to all users.

Would you like to know more about how to use these colors effectively in your maps, or do you need variations of this palette?