Hello.
Here's one of many ways.
Open your document.
Copy the original layer.
Add a layer mask.
Make a selection of the scrub top
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(Shown here with the original layer turned off.
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Add a Black & White adjustment layer, clip it to the copy layer of the original.
Adjust until the scrub top as light as you can go...........here it's a light grey.
[ATTACH=full]148475[/ATTACH]
Double click your foreground color and this will open the "Color Picker"
Select the color of the sample.
Now open a new Solid Color Fill adjustment layer and fill with foreground color.
Clip the Solid Color Fill adjustment layer to the copied original layer above the Black & White adjustment layer.
Set blending option to Darken.
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[ATTACH=full]148477[/ATTACH]
