How to use different colors for outlines in bookmarks in PDF document
This example teaches how to mark outlines with different colors in bookmarks tree in PDF document generated by ByteScout PDF SDK
Outlines marked with different colors in PDF

Program.vb:
VB

'*******************************************************************
'       ByteScout PDF SDK
'                                                                   
'       Copyright © 2016 Bytescout, http://www.bytescout.com        
'       ALL RIGHTS RESERVED                                         
'                                                                   
'*******************************************************************

Imports Bytescout.PDF

''' <summary>
''' This example demonstrates how to create document outlines (bookmarks).
''' </summary>
Class Program

    Shared Sub Main()

        ' Create new document
        Dim pdfDocument = New Document()
        pdfDocument.RegistrationName = "demo"
		pdfDocument.RegistrationKey = "demo"

        Dim font = New Font(StandardFonts.Times, 18)
        Dim brush = New SolidBrush()

        ' Create pages
        For i As Integer = 0 To 2
            Dim page = New Page(PaperFormat.A4)
            page.Canvas.DrawString(String.Format("Page {0}", i + 1), font, brush, 20, 20)
            pdfDocument.Pages.Add(page)
        Next

        ' Create outlines:

        Dim destination1 = New Destination(pdfDocument.Pages(0))
        Dim outline1 = New Outline("Page 1", destination1)
        pdfDocument.Outlines.Add(outline1)

        ' Example of sub-bookmark
        Dim destination2 = New Destination(pdfDocument.Pages(1))
        Dim outline2 = New Outline("Page 2", destination2)
        pdfDocument.Outlines(0).Kids.Add(outline2)

        Dim destination3 = New Destination(pdfDocument.Pages(2))
        Dim outline3 = New Outline("Page 3", destination3)
        pdfDocument.Outlines.Add(outline3)

        ' Force PDF viewer to show Bookmarks panel at start up.
        pdfDocument.PageMode = PageMode.Outlines


        ' Save document to file
        pdfDocument.Save("result.pdf")

        ' Cleanup 
        pdfDocument.Dispose()

        ' Open document in default PDF viewer app
        Process.Start("result.pdf")

    End Sub

End Class 

Program.cs:
C#

//*******************************************************************
//       ByteScout PDF SDK		                                     
//                                                                   
//       Copyright © 2016 ByteScout - http://www.bytescout.com       
//       ALL RIGHTS RESERVED                                         
//                                                                   
//*******************************************************************

using System.CodeDom;
using System.Diagnostics;
using Bytescout.PDF;

namespace Bookmarks
{
	/// <summary>
	/// This example demonstrates how to create document outlines (bookmarks).
	/// </summary>
	class Program
	{
		static void Main()
		{
			// Create new document
			Document pdfDocument = new Document();
			pdfDocument.RegistrationName = "demo";
			pdfDocument.RegistrationKey = "demo";
			
			Font font = new Font(StandardFonts.Times, 18);
			Brush brush = new SolidBrush();

			// Create pages
			for (int i = 0; i < 3; i++)
			{
				Page page = new Page(PaperFormat.A4);
				page.Canvas.DrawString(string.Format("Page {0}", i + 1), font, brush, 20, 20);
				pdfDocument.Pages.Add(page);
			}

			// Create outlines:

			Destination destination1 = new Destination(pdfDocument.Pages[0]);
			Outline outline1 = new Outline("Page 1", destination1);
			pdfDocument.Outlines.Add(outline1);

			// Example of sub-bookmark
			Destination destination2 = new Destination(pdfDocument.Pages[1]);
			Outline outline2 = new Outline("Page 2", destination2);
			pdfDocument.Outlines[0].Kids.Add(outline2);

			Destination destination3 = new Destination(pdfDocument.Pages[2]);
			Outline outline3 = new Outline("Page 3", destination3);
			pdfDocument.Outlines.Add(outline3);

			// Force PDF viewer to show Bookmarks panel at start up.
			pdfDocument.PageMode = PageMode.Outlines;
			
			// Save document to file
			pdfDocument.Save("result.pdf");

			// Cleanup 
			pdfDocument.Dispose();

			// Open document in default PDF viewer app
			Process.Start("result.pdf");
		}
	}
}