A distinguishable interface is something that makes the design of a system look and feel different. It is the way that you interact with the system and it can include things like buttons, menus, colors, and shapes. Distinguishable interfaces use different shapes, colors, and sizes so that it is easy for you to find the different options and know how to use them. For example, if there were two buttons on the screen, one might be blue and round, while the other might be square and orange. This way, it's easy to tell the difference between the two buttons and it makes it easier to use the system.