Liven up the colours
With the basic masking complete, we can turn our attention to other facets of the image. However, rather than flattening the Layers, keep them separate for now. Among other things, this will allow you to correct any mistakes you notice down the line. In the Layers palette, click the Create new fill or adjustment layer again, and pick Hue/Saturation. In the panel that appears, set the Saturation slider to govern the intensity of the colours. Here, I set the Saturation much higher than normal, at +60. If the image you’re working on is already quite colourful you won’t need as much, or may wish to reduce the Saturation for a more muted look. Next, add another Hue/ Saturation Adjustment Layer, but this time click the Colorize box. Set the Hue and Saturation sliders to make a sepia tone (45 and 25 here), or whatever colour wash works on your image. Finally, in the Layers palette, click Opacity and reduce it to about 30% or 40%.