public void updateColorFromHSV() // update values and button color
{
ColorTools.HSV2RGB(hue, saturation, value, out R, out G, out B);
redTB.Text = R.ToString();
greenTB.Text = G.ToString();
blueTB.Text = B.ToString();
hueTB.Text = hue.ToString();
satTB.Text = saturation.ToString();
valueTB.Text = value.ToString();
redTrackBar.Value = (int)(R * redTrackBar.Maximum);
greenTrackBar.Value = (int)(G * greenTrackBar.Maximum);
blueTrackBar.Value = (int)(B * blueTrackBar.Maximum);
hueTrackBar.Value = (int)(hue);
colorButton.BackColor = Color.FromArgb(255, ColorTools.Float2RGBClamp(R), ColorTools.Float2RGBClamp(G), ColorTools.Float2RGBClamp(B));
}