Set the blend mode to Color, the opacity to 50%, the gradient to
“Foreground to background color” and the angle to 90%. The gradient will
be saved as a layer style, so you can come back at any time to adjust the
values. Double-clicking the style name opens up the dialog window once
more.
See the colorful drops with optimized colors.Useful Photoshop Tips And Tricks For Photo Retouching (2)
Skin Color
If the skin is not quite perfect after retouching, it might be because of the
general hue. You can control it by going to New Adjustment Layer → Hue/
Saturation. Click on the miniature mask, and press Control/Command +
I to invert the mask.