Use the Hue/Saturation/Lightness command to shift all colors in an image and change their strength and lightness. Here’s how the command works:
Changing the hue shifts all pixels in an image around the color wheel to a different point. For example, if you change the red pixels to green, the green pixels turn to blue and the yellow pixels turn to cyan.
Changing the saturation adjusts the amount of grey in a color. The level of grey increases as the saturation decreases.
Changing the lightness adjusts the color’s brightness.
Important: To apply this command to a selection, the image must be a 16 million (24-bit) color image (otherwise the command is applied to the entire image). To increase the color depth of an image, see Increasing the Color Depth of an Image.
To use the Hue/Saturation/Lightness command:
To limit the correction to a specific area, make a selection in the image. See Using the Selection Tools.
Do one of the following:
To modify the image pixels directly, choose Adjust >Hue and Saturation > Hue/Saturation/Lightness.
To create an adjustment layer, choose Layers > New Adjustment Layer > Hue/Saturation/Lightness. For information on adjustment layers, see Using Adjustment Layers.
In the Edit
drop-down list, choose the color range to adjust. To edit all colors simultaneously,
choose Master. To edit a specific color
range, choose Reds, Yellows,
Greens, Cyans,
Blues, or Magentas.
The color rings represent the colors in the image. The outer ring represents
the original values and the inner ring represents the adjusted values.
If you choose a specific color range to edit, a control ring is added
between the inner and outer rings where you can change the color range
that you adjust.
To turn the image into a duotone (two-color) image, mark the Colorize check box. The image turns into a greyscale image (if you have previews or proofing on). You can now select a hue and adjust the saturation and lightness values to colorize the image.
If you are editing a specific color range (rather than the Master mode), you can change the color range that you adjust using the control ring:
To set the range width, drag the two outer points on the control ring, which mark the beginning and end of the adjustment area.
To change where the adjustment builds to full effect, drag the two inner bars. In the area between the two inner bars, the adjustment is in full effect.
To move the adjustment area, drag the white circle.
To change the hue, drag the Hue slider until the colors appear as you want
them. You can also type a value in the Hue
edit box.
The hue value is not on the typical hue scale of 0 to 255. Instead,
the value is the number of degrees of rotation around the 360 color wheel
from the pixel’s original color. A positive values indicates a clock-wise
rotation and a negative value indicates a counter-clockwise rotation.
For example, when the Hue value is at 180, blue becomes yellow and green
becomes magenta.
Drag the Saturation slider up to increase the saturation or drag it down to decrease the saturation. Values can range from -100 to 100; at zero the saturation is unchanged.
Drag the Lightness slider up to increase the lightness or drag it down to decrease the lightness. Values can range from -100 to 100; at zero the lightness is unchanged.
Click OK.
Changing the Color Balance of Shadows, Midtones, and Highlights
Changing the Overall Color Balance
Correcting Colors by Setting Black and White Points