Color Reduce

Reduces the full range of color in an image to two, three, or four colors that you select. Depending on the number of substitute colors you choose in the Reduce To parameter, this filter breaks down the full range of colors in the image into a color range for each Match Color parameter that’s available. The filter then substitutes the selected Replace With color for each interpreted range of color.

If two colors are selected, color information in the layer is reduced to the selected two colors; if three colors are selected, color information is reduced to three colors; and so on.

Canvas showing effect of Color Reduce filter

Adjust this filter using the parameter controls in the Filters Inspector: