Step 1: Select The Part Of The Image You Want To Have Remain In ColorWith our image open in Photoshop, the first thing we need to do is decide which partof the image we want to have remain in full color. In my case, I want the three horses and their jockeys in the foreground to remain in color. The rest of the image willbecome black and white. Once you’ve decided which part of your image will remain in color, use whichever selection tool you prefer (Lasso tool, Pen Tool, etc.) to select it:
We now have the area(s) of theimage that will remain in colorselected. Problem is, we actually Step 2: Invert The Selectionwant the exact opposite. We wantall the areas we’llbe removing the color fromselected, not the areas wherewe’re keeping the color.Fortunately, all we need to dois invert the selection, which willselect everything that’s notcurrently selected and deselecteverything that is currentlyselected. To do that, you caneither go up to the Selectmenu at the top of the screenand choose Inverse, or you canuse the keyboard Press “Shift+Ctrl+I” (PC)shortcut Shift+Ctrl+I (Win) “Shift+Command+J” (Mac) to invert the selection./ Shift+Command+I(Mac). Nowall of the areas that will becomeblack and white are selected, andthe areas that will remain in colorare not:
We’re going to be adding our Step 3: You can also press the letter I on yourHue/Saturation adjustmentlayer in a moment, but before Sample a going to sample a color from the keyboard to quickly select it. We’rewe do, if you want to colorize image, and then we’ll be using thatthe image rather than turningit black and white, grab color color to colorize the image a bit later on. With the Eyedropper toolyour Eyedropper tool selected, click on a color in the imagefrom the Tools that you want to sample. I’m going toPalette (below): sample a brown color from the face of one of the horses (left): Once you’ve sampled your color, you’ll see that color now appearing as the Foreground color in the Tools palette (right):
Step 4: Add A Hue/Saturation Adjustment LayerNow that we’ve sampled our color, we can add ourHue/Saturation adjustment layer. To do that, clickon the New Adjustment Layer icon at the bottom ofthe Layers palette (right):Then choose Hue/Saturation from the list ofAdjustment Layers that appears (below)
Step 4: ContinuedOne of the great things aboutadjustment layers is that eachone comes with its own layermask, which allows us to limitthe effect of the adjustmentlayer to specific areas in theimage. Since we had the areathat we want to remove thecolor from selected when weadded the Hue/Saturationadjustment layer, Photoshopwill use that selection whencreating the layer mask, as wecan see if we look at the layer The area that was selected before I added the adjustmentmask thumbnail in the Layers layer, which in my case was everything except the threepalette (right): horses and jockeys in the foreground of the image, appears as white in the layer mask, which means it will be affected by the adjustment. The horses and their jockeys, which were not selected, appear as black and will not be affected.
Step 5: Drag The Saturation Slider To The Left To Remove The ColorWith theHue/Saturationadjustment layeradded, removing thecolor at this point iseasy. Simply click ontheSaturation sliderin theHue/Saturationdialog box and dragit all the way to theleft. As you drag to Your image should now lookthe left, you’ll see like this, with everything blackthe color and white except for the areasdisappearing in the we initially selected where weimage, and dragging wanted the color to remainall the way to the left (above):removes the colorcompletely (right):