I'm trying to make a Texture out of Simplex noise, but it keeps appearing like this regardless of how big or small scale is:

The following code is used to produce the image's color date:

private Color[,] GetSimplex() {
    Color[,] colors = new Color[800, 600];

    float scale = colors.GetLength(0);

    for (int x = 0; x < 800; x++) {
        for (int y = 0; y < 600; y++) {
            byte noise = (byte)(Noise.Generate(x / scale, y / scale) * 255);
            colors[x, y] = new Color(noise, noise, noise);
        }
    }

    return colors;
}