Question

While it is of course possible to use BaseColor, by default, it offers very limited choices.

I wonder how can i add my own custom color to the document?

...
        PdfPTable table = new PdfPTable(3);

        PdfPCell cell = new PdfPCell(new Phrase("some clever text"));
        cell.setBackgroundColor(BaseColor.GREEN);
        table.addCell(cell);
...

Answer 1

Lots of options.

BaseColor color = new BaseColor(red, green, blue); // or red, green, blue, alpha
CYMKColor cmyk = new CMYKColor(cyan, yellow, magenta, black); // no alpha
GrayColor gray = new GrayColor(someFloatBetweenZeroAndOneInclusive); // no alpha

There’s also pattern colors and shading colors, but those are Much Less Simple.