There are many reasons for converting coloured images to black and white. Monochrome photos highlight lines, light, and shapes. Colour can sometimes be distracting or dull. Also, we see the world in colour. A photo in black and white is a welcome change. It draws our attention to different aspects of our everyday world. In many ways, monochrome simplifies the image by removing the colour. And some photographers find monochrome photos more artistic.
There’s no formula for deciding which photos work better in monochrome or colour. However, removing colour is easy. I’ll show you how to convert an image to black and white in Lightroom and Photoshop. In both programs, there is a simple method and one that gives more artistic flexibility.
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How to Convert an Image to Black and White in Lightroom
Simple Black and White Conversion
Lightroom makes it easy to remove colour from a photo. Go to the Settings drop-down menu and select Settings > Convert to Black and White (hotkey “V”). You can also do this in the Develop Module by choosing the Black & White treatment option in the Basic panel. This will switch your photo’s Profile to Adobe Monochrome.
Selecting this option will quickly change any picture into black and white. Let’s look at a photo where colour is not as important as the composition. This photo is about a line extending out into the water and the light from the rising sun. Converting the image to black and white emphasises these elements.
Many photographers stop with this simple black and white conversion. But Lightroom has more to offer.
Colour Adjustment in Black and White
After you convert your image to monochrome, the HSL/Color panel becomes the B&W panel. Lightroom still recognises the colours in your photo even though you cannot see them. In this panel, there are eight colour channels with sliders. By default, the sliders are at zero. You can selectively lighten and darken the colours in your image. This adds richness and visual separation to your photo. You can emphasise and deemphasise certain colours.
Be cautious when using sliders. Pushing sliders to the extreme ends might create a halo (a light around the subject). Or colour gradations pixelate and become uneven.
In this image of a local garden centre, there is almost too much colour. It isn’t easy to make sense of the scene. The bright colours pull your eyes all over the frame.
Converting the image to black and white simplifies the scene, but the colours are equally weighted. Most show up in shades of grey. For instance, there is little distinction between the green plants and the red bench.
Using the B&W panel, you can adjust colour exposure. In this image, I brightened the reds and darkened the greens. There is now a visual distinction between the bench and the leaves. I also darkened the blues, which darkened many elements in the background. This made the red bench lighter in comparison.
I had to be a bit careful with the flowers in the foreground. A halo appeared when I pushed the purple and magenta sliders too far to the left. In this comparison, I darkened the purples and magentas to -50. Notice that the front flowers on the right side now have a white border or halo.
Lightroom includes a simple black and white conversion tool. The program also allows you to adjust each colour channel individually. Photoshop has similar tools for black and white conversion.
How to Convert an Image to Black and White in Photoshop
Photoshop has a couple of simple black and white conversion tools.
Desaturation is the simplest way to convert your images to black and white in Photoshop. This method is quick, but it is destructive. It changes your original file. It’s always a good idea to work on a copy of your image in case you make a mistake or want to try something different. There are a few ways to do this:
- Right-click on the background layer and select Duplicate Layer.
- Drag your background layer to the + sign in the Layers panel.
- Use the keyboard shortcut Ctrl or ⌘J.
To convert your layer to black and white, go to the Image drop-down menu. Select Image > Adjustments > Desaturate (Shift-Ctrl or ⌘U). Photoshop quickly strips your image of colour.
In the desaturated image, the yellows and reds of the peppers are very similar in tone. You might not realize that there were two colours of peppers in the bushel.
Another way to remove the colour from your photos is by creating a grayscale image.
- Go to the Image drop-down menu.
- Select Image > Mode > Grayscale.
I find that this method retains more tonal range than the Desaturate tool, but it is also destructive. All colour information is lost.
Converting your images to grayscale or using the Desaturate command are both easy. But these tools don’t allow you to control the monochrome conversion. Photoshop has another tool for that.
Black and White Adjustment Layer
Adding a Black and White adjustment layer is a non-destructive way to convert your photo to monochrome.
- Go to the Layer drop-down menu.
- Select Layer > New Adjustment Layer > Black and White.
Photoshop does a basic monochromatic conversion. From there, you can selectively adjust each colour channel in the Properties panel. For instance, I can lighten the yellows and darken the reds. Or I can reverse this and make the red pepper light and the yellow peppers dark.
The way you adjust the individual sliders makes a big difference to your final image.
Notice that the Black & White adjustment layer has a mask. Paint black on this mask, and the colour reappears. This is an easy way of making partial black and white images. Depending on the area over which you use the mask, you can convert the background to black and white using Photoshop.
Converting your images to black and white can be a simple click in both Lightroom and Photoshop.
For a simple conversion, use the Desaturate command in Photoshop or select the Convert to Black and White tool in Lightroom. For a more artistic control, add a Black & White adjustment layer in Photoshop or the B&W panel in Lightroom.
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