Choose
Choosing Color
The first function of the Replace Color palette is to allow you to choose the color you want to replace. By default, the color box will feature the foreground color selected in your Pixelmator toolbox. Clicking the color box brings up the Mac OS X Color Picker from where you can choose which colors you want to replace.
Setting the Radius
The second control in the palette is the Radius. The radius lets you specify how wide the colors can extend from the base color selected above. A narrow radius will switch only a limited palette, while a high radius will replace more color variants.
A unique feature of the radius control is that while adjusting it will tell you which range of colors are affected. While moving, any pixels that show white are in the affected range, while the black pixels are not going to be touched by any adjustment.
Color Wheel
Spin the dots around the color wheel to get your desired color change. Reference the color dot you want to switch to the color you have selected in the first tab.
Adjusting Saturation
With the saturation slider, you can adjust the level of color that each affected pixel holds.
Adjusting Lightness
The third function of the Hue/Saturation tool, is to adjust the lightness of the affected pixels.
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