Please take a look at the TextFields example. You'll find the following code snippet to set the border of the field with name
fields.get("text_2").setFieldFlags(0); fields.get("text_2").setBorderColor(Color.RED); fields.get("text_2").setValue("bruno");
Now when we look inside the resulting PDF using iText RUPS, and we take a look at the field dictionary / widget annotation for this field, we see that the border color (
/BC) entry of the
/MK entry is an array with three values:
[ 1 0 0 ]. This means that the border color is an RGB color where the value for Red is 1, the value for Green is 0, and the value for Blue is 0. This is consistent with us setting the color to
Color.RED when we created the file.
You say that you have the
AcroField.Item object for a field. In iText 7 it would be a
PdfFormField object. Now you need to get the widget annotation dictionary and follow the path to the
/BC dictionary. This will look like this (
name is a
String value of the field you are interested in):
PdfDocument pdfDoc = new PdfDocument(new PdfReader(src)); PdfAcroForm form = PdfAcroForm.getAcroForm(pdfDoc, true); PdfDictionary field = form.getField(name).getWidgets().get(0).getPdfObject(); PdfDictionary mk = field.getAsDictionary(PdfName.MK); PdfArray bc = mk.getAsArray(PdfName.BC);
The values stored in the array
bc will inform you about the background color. If the array has only one value, you have a gray color, if there are three, you have an RGB color, if there are four, you have a CMYK color.
Warning: some values may not be present (e.g. there may be no
/BC entry). In that case you can get
Click this link if you want to see how to answer this question in iText 5.