* is 100% color
     */
    public void setColorStroke(final PdfSpotColor sp, final float tint) {
        checkWriter();
        state.colorDetails = writer.addSimple(sp);
        PageResources prs = getPageResources();
        PdfName name = state.colorDetails.getColorName();
        name = prs.addColor(name, state.colorDetails.getIndirectReference());
        content.append(name.getBytes()).append(" CS ").append(tint).append(" SCN").append_i(separator);
    }