How to change the color of a circle annotation?

How do I change the Fill Color annotation property?

Please take a look at the CircleAnnotation example. It creates a circle annotation with a blue border and red as the interior color:

Colored circle annotation

The code to add this annotation looks like this:

public void manipulatePdf(String src, String dest) throws IOException, DocumentException {
    PdfReader reader = new PdfReader(src);
    PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
    Rectangle rect = new Rectangle(150, 770, 200, 820);
    PdfAnnotation annotation = PdfAnnotation.createSquareCircle(
        stamper.getWriter(), rect, "Circle", false);
    annotation.setTitle("Circle");
    annotation.setColor(BaseColor.BLUE);
    annotation.setFlags(PdfAnnotation.FLAGS_PRINT);
    annotation.setBorder(new PdfBorderArray(0, 0, 2, new PdfDashPattern()));
    annotation.put(PdfName.IC, new PdfArray(new int[]{1, 0, 0}));
    stamper.addAnnotation(annotation, 1);
    stamper.close();
}

I based this example on the TimetableAnnotations3 example. The only thing I added was the line that sets the interior color:

annotation.put(PdfName.IC, new PdfArray(new int[]{1, 0, 0}));

Caveat:

some PDF viewers (such as Chrome PDF viewer) are not full PDF viewers. They don't support every type of annotation. For instance, if you open hello_circle.pdf in Chrome, you won't see the annotation. That is not a problem caused by the PDF (nor iTextSharp), that is a viewer problem.