PDFsharp & MigraDoc Foundation

using MigraDoc.DocumentObjectModel;

// ... (your code)

bool isColored = false;
foreach (Section section in document.Sections) {
  foreach (Paragraph paragraph in section.Paragraphs) {
    Color paragraphColor = paragraph.Format.Font.Color;
    if (paragraphColor.A != 0 || paragraphColor.R != 0 || paragraphColor.G != 0 || paragraphColor.B != 0) {
      isColored = true;
      break;
    }
  }

  // Check for colors in tables, images, and other elements
  foreach (Table table in section.Tables) {
    // Iterate through table cells, borders, and fills to check for colors
  }
  // Similar logic for images and other elements
}

if (isColored) {
  Console.WriteLine("The PDF contains color elements.");
} else {
  Console.WriteLine("The PDF likely uses black and white content.");
}