Hidden Luminosity Mask trick in Photoshop

Colin Smith

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Hidden use of Black and White to fix color

Photoshop tools are designed to do certain things. Sometimes, with some imagination, we can use them in different ways than intended to get some really useful results. I love to experiment and try things, and here is something I came up with, that I use quite a bit. This is a case of using Black and White, to darken and lighten COLORS!.

Here is the starting photo. Notice how the background is very bright and saturated and fights with the subject for attention.

Bride in a white gown on a rope swing in a bright green forest, the starting photo

Let’s tone the background colors using an unexpected way.

In the Layers panel, click on new adjustment layer

Black and White adjustment layer icon in Photoshop, a half dark, half light circle

Choose Back and White

Luminosity masks in photoshop 2024

The image will change to grayscale.

You typically move the sliders to adjust the tones in the color areas to get a better black and white conversion.

Black and White adjustment layer in Photoshop turning the bride on the swing photo monochrome

We are going to keep the image color, but use the sliders to darken or lighten the colors.

Change the blend mode to Luminosity, so only the brightness will change and not the colors.

You will already see a difference because the sliders aren’t in a neutral position.

Black and White adjustment layer blend mode set to Luminosity, keeping the photo in color

Move the slider in the reds to lighten or darken skin tones. This has a lot of other uses, from making sunburn and more.

Also move the yellow and green sliders to darken the foliage in the background and make the color more cinematic.

Of course, you will use this on your own photos and adjust in a way that is personally pleasing for you (Just because I like this style of color grade doesn’t mean everyone does. The cool part is you get to adjust how you want).

Black and White sliders adjusted with Luminosity blending to darken the bright green forest

Another way to work, choose the picker tool

As you drag over colors directly on the image, you can adjust their brightness.

Targeted adjustment tool in the Black and White panel, dragging on the green leaves to darken them

Because we are adjusting the brightness, it changes the way the colors look. (Red becomes pink, if lightened)

If you want to shift the colors you can.

Choose a new Hue Saturation Adjustment layer

Hue/Saturation chosen from the adjustment layer menu in the Photoshop Layers panel

Choose the picker tool

Hue/Saturation properties with the picker tool, ready to click a color on the bride photo

Click on the color you want to adjust.

It will now limit it to the selected colors

Hue/Saturation limited to the Yellows range with the color range sliders highlighted in red

You can now adjust the saturation and color if you like, check it out on the video above to see what I did.

I hope you found this tutorial useful!

Drop a comment and let us know if you did.

Great to see you at the CAFE

Colin

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14 comments

  1. David Jones

    What an interesting way of adjusting color and luminosity, thanks Colin! You are always thinking outside the box!!!

  2. Robert Wennerberg

    Very useful tutorial, I hade one photo that my friend hade wondering if I culd fix. It was an underwater photo of a lobster, their the lighting came loose, so part of the lobster get dark. I have try to fix it with diffrent program and settings for nearly 17 year, and to day with your tutorial I fixed the photo.

  3. I often use Nik Silver Efex in Luminosity Blend in colour images but it had not dawned on me to do this. Thank you Colin.

  4. William Brennan

    Thank you Colin. Have used this feature for color to bw conversions. Never considered it to fix color. Creative

  5. Richard Bourdeau

    Happy Birthday. I have adjusted in B&W but never in reverse. Great and very useful trick. Many thanks.

  6. Nigel Rawlings

    As always so practical, gives a great choice for effects. Thanks

  7. Excellent! I love discovering new ways of taking care of moves that need to be made like this.

  8. sharon garner

    All of your tutorials are excellent! I look forward to each one. Thank you so much!

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