Click the Droplet tool and add the droplet in the selection to mark the area you want to recolor. You can add multiple droplets based on your needs.
To focus on one selection at a time, press Control+D (Win)/Cmd+D (macOS). You can also choose Select > Deselect to remove the existing selection before making a new selection.
For each droplet, a set of customized colors is displayed in the Color Palette. Simply select a droplet (selected droplets appear with a blue outline) and click the desired color from the Color Palette.
You can also use the vertical slider in the All Applicable Colors panel or use the icon to select a desired color.
The last used color appears next to the Color Palette swatches. You can use this to select the previously used color.
Learn how to quickly transform a black and white photo to color or change the colors in specific areas of a photo.