Add color to div tag which is in PDF(Exporting data from aspx page)

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C#

I'm trying to add color to div in PDF by using entrystyle and ending the style by using exitstyle.But when i use exit style the color is not showing,also by using the entry style the color applies to whole not only that specific div.

protected void PDf()
    {
        dt1 = DAL.GetAllData(productID, pdvID, UserID);
       
        ProductInformation.InnerText = "Product Information-Version" + versionName;
        //DataListProductInformation.DataSource = dt1.Tables[];
        //DataListProductInformation.DataBind();
        AuditTrails.InnerText="Audit Trails-Version" + versionName;
        DataListAuditTrails.DataSource = dt1.Tables[1];
        DataListAuditTrails.DataBind();
        Comments.InnerText = "Comments-Version" + versionName;
        DataListComments.DataSource = dt1.Tables[2];
        DataListComments.DataBind();
        SupportDocuments.InnerText = "Support Documents-Version" + versionName;
        DataListSupportDocuments.DataSource = dt1.Tables[3];
        DataListSupportDocuments.DataBind();
        ArtworkDocuments.InnerText = "Artwork Documents-Version" + versionName;
        DataListArtworkDocuments.DataSource = dt1.Tables[4];
        DataListArtworkDocuments.DataBind();
        GPRReports.InnerText = "GPR Report-Version" + versionName;
        DataListGPRReports.DataSource = dt1.Tables[5];
        DataListGPRReports.DataBind();
        Annotations.InnerText = "Annotations-Version" + versionName;
        DataListAnnotations.DataSource = dt1.Tables[6];
        DataListAnnotations.DataBind();

        Response.ContentType = "application/pdf";
        Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.pdf");
        Response.Cache.SetCacheability(HttpCacheability.NoCache);
        StringWriter sw = new StringWriter();
        HtmlTextWriter hw = new HtmlTextWriter(sw);
       
        textStyle.ForeColor = Color.Blue;
        hw.WriteLine(Statename);//here im adding div id
        hw.EnterStyle(textStyle, HtmlTextWriterTag.Div);//and adding color to div
        Statename.InnerText = "State-Version" + versionName;
        DataListStatename.DataSource = dt1.Tables[0];
        DataListStatename.DataBind();
       //hw.ExitStyle(textStyle, HtmlTextWriterTag.Div);
        bindpdf.RenderControl(hw);
        StringReader sr = new StringReader(sw.ToString());
        Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);

        HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
        PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
        pdfDoc.Open();
        htmlparser.Parse(sr);
        pdfDoc.Close();
        Response.Write(pdfDoc);
        Response.End();
    }

my problem is I wanna use color for particular div and close. because there was some content in between the tags. Exactly I wanna shoe color for heading that is div and content in grid.