Every color is described by three properties: hue, saturation and lightness. Hue is the attribute we use to classify a color as red or yellow. Saturation describes the neutrality of a color ...
Also, you can hit Auto to let Photoshop do the adjustment for you but it could be inaccurate. Hue, saturation and lightness are commonly referred as the three main attributes of perceptual color. Hue ...