I then added colour/ tone to the portrait. Here, I was assisted by the eyedropper tool in Photoshop, as well as the magnetic lasso tool to help me highlight the areas I wanted to colour and prevent me going over the lines. To create depth, I used the paint brush tool, but set the opacity to around 25% so I continually had to click the same spot a few times to get the darker tones (e.g- collar of the jacket)