Setting Hue Shift, Saturate, and Contrast

Use the Hue Shift, Saturate, and Contrast fields for fine control over the color you are adjusting. The defaults for these parameters are 0, 100, and 100 respectively.

Hue Shift

Changes the colors in the image. Since you are working with a circle, a hue shift value of 360 returns to the original color or image. A hue shift of 180 is equivalent to a negative, as the colors are at their complements.

You can use hue shift to compensate for material that is too hot or cool, or simply to correct undesired tones present in the images. Note that in a monochrome or very low saturation image, a hue shift produces no results, since there is no hue to begin with.

To apply a hue shift:

Do one of the following:

• Adjust the Hue Shift field.
• Place your mouse on the outer ring of the color wheel and drag in a circular motion.

Saturate

Saturation indicates how concentrated the color is: a saturated color has very little gray, while a de-saturated one is "dampened" with more gray. For example, a pastel blue has a very low saturation level, while a blue screen is heavily saturated. A scarlet red has a high saturation, while a pale pink has a low one.

To use saturate:

Adjust the Saturate field.

Contrast

Contrast indicates the difference between the light and dark colors in an image. A high-contrast image is mostly black and white, with very little gray. A low-contrast image is very flat, foggy, and composed mostly of midtones.

To use contrast:

Adjust the Contrast field.