How to keep one color in a black-and-white photo on Mac
Make a blue detail stand out while the rest of your photo turns black and white, then compare the result with the original.
- What you'll achieve
- The chosen blue detail stays in color while the rest of the portrait appears in black and white, with a before-and-after comparison ready to inspect.
- What you need
- Color Splash for Mac
- A photo containing a distinctive color to preserve

A single colorful detail can give a black-and-white photo a clear focal point. Color Splash for Mac lets you sample the color directly from the image, adjust its range, and check the result against the original.
1.Open Color Splash
Launch Color Splash on your Mac. From the starting workspace, choose Open photo to begin with your image.

The Color Splash for Mac starting workspace with the Open photo control and sample photos. 2.Load a photo with a distinct color
Choose a portrait or another photo with a color you want to preserve. Confirm that the photo appears in the canvas.

The original full-color portrait of a man wearing a vivid blue scarf, loaded in Color Splash. 3.Open the focus editor
In the Focus workspace, click Set Focus to begin choosing a color directly from the photo. The editor then asks you to click the color you want to keep.

The Focus editor on the original color portrait, prompting the user to pick a color. 4.Sample the color to keep
Click the blue scarf in the photo. The selective-color preview appears, and the inspector reveals Colour range and Where controls.

A blue scarf remains colored against a grayscale portrait after sampling, with Colour range at 22 percent. 5.Refine the color range
Adjust Colour range until the blue scarf stands out without restoring unwanted colors elsewhere in the photo. The example uses 35%.

A blue scarf is preserved in a black-and-white portrait with Colour range adjusted to 35 percent. 6.Apply the color focus
Click Apply Focus to commit the effect. The blue scarf stays colored while the surrounding portrait becomes monochrome.

The completed selective-color photo with its vivid blue scarf and monochrome surroundings. 7.Compare with the original
Use the comparison button in the top toolbar to view the original and edited photo side by side. Move the divider to inspect the color effect.

A before-and-after comparison showing the original color portrait on the left and the blue-scarf selective-color effect on the right.
Tips
Sample a strongly colored area, away from skin and neutral backgrounds, for the most precise result.
Fine-tune Colour range before applying the focus to avoid preserving unwanted colors.