I have learned a wonderful way to add a color tint to your pictures in Photoshop.

Open Original

Original

Add adjustment layer by using the button on your layers palette and choosing the first option called Solid Color. Don’t worry what color it chooses at first, just click OK. Change the blend mode to Soft Light.

Now double click on the color square on the new layer (which has a mask if you need it) and move your cursor in the Color Picker box that pops up to easily preview the effect on your image.

Brown tone

Blue tone