Here is a color palette designed for a developer portfolio site with a black theme and blue color accents, adhering to AAA standards for accessibility:

json
{
  "palette_name": "Developer Portfolio Black and Blue",
  "colors": [
    {
      "name": "Rich Black",
      "hex_code": "
          
          #101820
       "
    },
    {
      "name": "Deep Blue",
      "hex_code": "
          
          #003DA5
       "
    },
    {
      "name": "Bright Blue",
      "hex_code": "
          
          #007BFF
       "
    },
    {
      "name": "Light Grey",
      "hex_code": "
          
          #D3D3D3
       "
    },
    {
      "name": "White",
      "hex_code": "
          
          #FFFFFF
       "
    }
  ]
}

Palette Description:

• Rich Black serves as the primary background color, providing a solid dark base for the portfolio.
• Deep Blue is used for prominent elements and headings, offering a strong accent.
• Bright Blue can be utilized for buttons and links, ensuring they stand out against the black background.
• Light Grey serves as a secondary text color for improved readability without overwhelming brightness.
• White can be used for contrast in text and important elements to enhance visibility.

Would you like to explore specific shades or additional colors for your portfolio?