Colour a backdrop
If you shoot a portrait against a simple grey background like this, it’s easy to change the colour in Photoshop. Use the Magic Wand or Quick Selection tool to select the area, and use Refine Edge to improve the selection, then add a Hue/ Saturation adjustment layer. Check ‘Colorize’, then use the Hue and Saturation sliders to choose a colour. If you want to tone the colour down, simply lower the Hue/ Saturation layer’s opacity.