Choose Layer >New Adjustment Layer >Hue/Saturation to add a new hue/saturation adjustment layer. It should appear as the top layer. Adjust the color and saturation to your likings.

• 选择图层-新建调整图层-色相饱和度，调整色相饱和度。此图层为最上层，色相饱和度调到你喜欢的颜色，见下图：