I'm tyring to add points to a a map. And regardless of how many pins are on this map, each pin will get its own color. I want to only change the hue

I'm using a template png that looks like this

![enter image description here](https://i.stack.imgur.com/1VMhi.png)

I want to create function that when a new point occurs this file will get randomly colored.

How would I do this?

Code below I'm working with - I am unable to figure out how to throw random values in the matrix to output any good colors that are spaced far enough in the color palate 

```
 private Bitmap ColorMyPin()
{
    Image imgPicture = Properties.Resources.green_MarkerBlank;

    Bitmap bmp = new Bitmap(imgPicture.Width, imgPicture.Height);

    ImageAttributes iaPicture = new ImageAttributes();
    ColorMatrix cmPicture = new ColorMatrix(new float[][]
    {
        new float[] {0, 0, 0, 0, 0},
        new float[] {0, 0, 0, 0, 0},
        new float[] {0, 0, 0, 0, 0},  <-- //Hard part where do i throw random() values at
        new float[] {0, 0, 0, 0, 0},
        new float[] {0, 0, 0, 0, 0}
    });

    // Set the new color matrix
    iaPicture.SetColorMatrix(cmPicture);

    // Set the Graphics object from the bitmap
    Graphics gfxPicture = Graphics.FromImage(bmp);

    // New rectangle for the picture, same size as the original picture
    Rectangle rctPicture = new Rectangle(0, 0, imgPicture.Width, imgPicture.Height);

    // Draw the new image
    gfxPicture.DrawImage(imgPicture, rctPicture, 0, 0, imgPicture.Width, imgPicture.Height, GraphicsUnit.Pixel, iaPicture);

    return bmp;
}

```

After

![enter image description here](https://i.stack.imgur.com/vp0On.png)