Use Sponge tool to change color saturation in your image

Select the Sponge tool (O) from the toolbar. If you can’t find the Sponge tool, select and hold the Dodge tool to show the other related tools, and then select the Sponge tool.

In the Options bar, do the following:

• Select a Brush tip and set the Brush options.
• Select Saturate or Desaturate from the Mode option as per your requirement.
• Set Flow and select Vibrance.
• Use Pressure for Size.

Drag over the part of your image that you want to modify.