I'm using the following bit of code to set a transparent color for a 2dTexture

TextureCreationParameters tcp = TextureCreationParameters.Default;
tcp.Format = SurfaceFormat.Color;
tcp.ColorKey = Color.Black;
tile = Texture2D.FromFile(graphics.GraphicsDevice, "http://tile.PNG", tcp);

What I want to do is specify a color using RGB values, I presume it's done using the line

tcp.ColorKey = Color.Black;

But I cannot find a way to get Color to accept RGB values. Could some help, please?

Cheers