Acorn Acorn 6

Color Adjustment

Under  Filter ▸ Color Adjustment there are 5 filters for adjusting the color of your image: Color Controls, Exposure Adjust, Gamma Adjust, Hue Adjust and White Point Adjust.

See Also:  Curves and Levels

Color Controls

You can use the color controls filter to change the saturation, brightness, and contrast of your image.  As with all filters in Acorn, you can save your changes as presets.


Saturation is the intensity of color in your image. If you slide the slider to the left (to 0), the image will become black and white, and if you slide it to the right (2.00) it will become fully saturated.

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No Saturation       Original Image                                                      Full Saturation


Brightness is the darkness or lightness in your image.  If you drag the brightness slider all the way to the left your image will become totally black, if dragged to the right it will become completely white. You should only need to adjust the brightness of an image a little bit, especially if the photo has a correct exposure.


Contrast is the difference between the lights and darks of your image. A higher contrast will have darker darks and lighter lights.  A lower contrast or no contrast will make the tones in the image appear the same.

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No contrast        Original Image                                                       Full Contrast

Exposure Adjust

The exposure is how much light is exposed to the film or sensor when taking a photo. If the exposure is too high, the image will be very bright with very little darks. If the exposure is too low, the image will be darker.  You can adjust this using the Exposure Adjust filter.

Gamma Adjust

Gamma Adjust leaves blacks and whites unchanged, while adjusting the mid-point colors of your image.  A high gamma level can create a washed out appearance to an image, but a small adjustment usually creates a pleasing result.  

Hue Adjust

The Hue Adjust filter adjusts the color of your image, leaving black, white, and gray alone.

There is a dial to adjust the color of your image. Think of the dial as a compass. If the dial is placed south, it will show your original image, to the west and it will become red, north for blue, and east for green.

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                Red Hue    Blue Hue                   Green Hue

White Point Adjust

The White Point Adjust filter determines what "white" is in your photo. Light isn't usually really white. It can have tints of yellow, orange, or blue. The true color of white depends on the lighting when the photo was taken. For best results choose a natural color that is close to white.

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                                 Blue light                                                           White light                                                          Yellow light