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kentc | all galleries >> misc. > CAbrushColor.jpg
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A somewhat longer fix, but imo, better fix. In PS, top menu, go Select>color range, and click on the purple fringing with the eyedropper, this creates a selection. You can improve the selection by taking the '+ eyedropper' in the color range dialog box and click on other hues of purple. You can adjust 'fuzziness' which expands or contracts the range of hues selected - mine was set at @150. In this sample there is some purple in the white (sky) which is brighter, and some on the leaves that is a darker shade. I clicked the + eyedropper on those to get the full selection. If you zoom to 300% you will see that not all the purple is selected. Do an Ok on the color range dialog box, and then go to Select>Modify>expand and enter a pixel number (how much will depend on the original size of your image) on this one I chose 1 pixel. This expands the selection 1 pxl to include most of the purple.

With the selection still active, take the eyedropper from the tool bar and select (in this case) a dark green of one of the leaves. Choose the brush tool and on the option bar above, set the mode to "color" and the opacity to @30%**. Then start brushing the purple away. This only affects the selected areas so you don't have to be careful about brushing and you can use a big brush. Once all the purple is gone and now replaced with green, Select>deselect. This should be good enough, but you could also take the Sponge tool set on the option bar above to "desaturate" and again at 50%, and touch up areas that may not have been selected or that show the 'other side' of the purple - a bright green/blue, usually opposite of where the purple was.

**When any brush is set at a lower opacity - 30% in this case, the hue chosen doesn't come in a full stregnth as long as you don't pick up (let up on the mouse click, or lift the pen if you are using a tablet. Each new stroke over the same area adds more of the dark green, in this case. If the surrounding area is lighter, only hit it once, if darker, more, etc.

Canon PowerShot G1
1/50s f/3.5 at 7.0mm full exif

other sizes: small original