The Hue/Saturation adjustment has three components—Hue, Saturation, and Lightness—as shown in the following screenshot:
- Hue: This basically refers to the shades of a color available in the spectrum. It is the Hue that determines if there is a light blue or a violet blue. What the Hue does is switch or rotate the color spectrum behind the scenes. By using the Hue slider, you can change the color of everything in the image.
- Saturation: This refers to just how red you want your red and how blue you want your blue. Sliding the Saturation slider to the left will pull colors out until the image is black and white, while sliding it to the right will oversaturate your image with color.
- Lightness: This is how much "light" you will allow in your image. Sliding the Lightness bar to the left will let in less light until the image is black. Moving it to the right will add more until it is pure white. This is similar to brightness, but the algorithm it uses is different, making its effects more uniform.
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