private void knumBlueChannelValue_ValueChanged(object sender, EventArgs e)
{
ColourUtilities.UpdateColour(pbxColourPreview, 255, Convert.ToInt32(knumRedChannelValue.Value), Convert.ToInt32(knumGreenChannelValue.Value), Convert.ToInt32(knumBlueChannelValue.Value));
kbtnSaveColour.Enabled = true;
}