Неправильно отображается цвет Directx

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
 
namespace DirectX
{
    class Program
    {
 
        static void Main()
        {
            using (Form1 frm = new Form1())  // Show our form and initialize our graphics engine 
            {
                frm.Show();
                frm.InitializeGraphics();
                Application.Run(frm);
            }
        }
    }
    class Form1 : Form
    {
 
        private Device device = null;
        private VertexBuffer vb = null;
        /// <summary> 
        /// We will initialize our graphics device here 
        /// </summary> 
        public void InitializeGraphics()
        {
            // Set our presentation parameters
            this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.Opaque, true);
            PresentParameters presentParams = new PresentParameters();
            presentParams.Windowed = true;
            presentParams.SwapEffect = SwapEffect.Discard;
            // Create our device 
            device = new Device(0, DeviceType.Hardware, this, CreateFlags.SoftwareVertexProcessing, presentParams);
            CustomVertex.PositionColored[] verts = new CustomVertex.PositionColored[3];
            
            vb = new VertexBuffer(typeof(CustomVertex.PositionColored), 3, device, Usage.Dynamic | Usage.WriteOnly, CustomVertex.PositionColored.Format, Pool.Default);
            vb.Created += new EventHandler(this.OnVertexBufferCreate);
            OnVertexBufferCreate(vb, null);
            
            device.DeviceResizing += new CancelEventHandler(this.CancelResize);
        }
        float angle = 50;
        private void SetupCamera()
        {
 
            device.RenderState.Lighting = true;
            //device.RenderState.CullMode = Cull.None;
            device.Transform.Projection = Matrix.PerspectiveFovLH((float)Math.PI / 4, this.Width / this.Height, 1.0f, 100.0f);
            device.Transform.View = Matrix.LookAtLH(new Vector3(0, 3, 5.0f), new Vector3(), new Vector3(0, 1, 0));
            //device.Transform.World = Matrix.RotationYawPitchRoll(angle / (float)Math.PI, angle / (float)Math.PI * 2.0f, angle / (float)Math.PI);
            //angle += 0.1f;
        }
        private void CancelResize(object sender, CancelEventArgs e)
        {
            e.Cancel = true;
        }
        private void OnVertexBufferCreate(object sender, EventArgs e)
        {
            VertexBuffer buffer = (VertexBuffer)sender;
            CustomVertex.PositionColored[] verts = new
            CustomVertex.PositionColored[3];
            verts[0].Position = new Vector3(0.0f, 1.0f, 1.0f);
            verts[0].Color = System.Drawing.Color.Aqua.ToArgb();
            verts[1].Position = new Vector3(-1.0f, -1.0f, 1.0f);
            verts[1].Color = System.Drawing.Color.Black.ToArgb();
            verts[2].Position = new Vector3(1.0f, -1.0f, 1.0f);
            verts[2].Color = System.Drawing.Color.Purple.ToArgb();
            buffer.SetData(verts, 0, LockFlags.None);
           
        }
        protected override void OnPaint(PaintEventArgs e)
        {
            device.Clear(ClearFlags.Target, System.Drawing.Color.CornflowerBlue, 1.0f, 0);
            SetupCamera();
            
            device.Lights[0].Type = LightType.Point;
            device.Lights[0].Position = new Vector3();
            device.Lights[0].Diffuse = System.Drawing.Color.White;
            device.Lights[0].Attenuation0 = 0.2f;
            device.Lights[0].Range = 10000.0f;
            device.Lights[0].Enabled = true;
            device.BeginScene();
            device.VertexFormat = CustomVertex.PositionNormalColored.Format; 
            device.SetStreamSource(0, vb, 0);
            device.DrawPrimitives(PrimitiveType.TriangleList, 0, 12);
            device.EndScene();
            this.Invalidate();
            device.Present();            
        }
    }
}

vb = new VertexBuffer(typeof(CustomVertex.PositionColored), 3, device, Usage.Dynamic | Usage.WriteOnly, CustomVertex.PositionColored.Format, Pool.Default);

vb = new VertexBuffer(typeof(CustomVertex.PositionNormalColored), 3,device, Usage.Dynamic | Usage.WriteOnly, CustomVertex.PositionNormalColored.Format, Pool.Default);

verts[0].Normal = (new Vector3(0.0F, 0.0F, -1.0F));
            verts[1].Normal = (new Vector3(0.0F, 0.0F, -1.0F));
            verts[2].Normal = (new Vector3(0.0F, 0.0F, -1.0F));

CustomVertex.PositionColored[] verts = new CustomVertex.PositionColored[3];

CustomVertex.PositionNormalColored[] verts = new   CustomVertex.PositionNormalColored[3];