This video shows how you would set any primary or accent colours within your app. The colours would be given an ID created by the app developer, using the ID we can reference which accent colour to change. We can change the colours by the clicking on the eye drop icon which brings up a colour slider or by entering a hex colour value into the textfield if you know which colour you are looking for. You could also select one of the colours on the bottom tab which shows the other colours that have been used in your app.