You can order real paint colour samplers online and have them delivered direct to your door.

Once you have received your samplers in the post you just peel back the foil lid and apply to the surface that you wish to decorate. Dulux colour samples contain 30ml of paint - just the right amount to cover an area roughly the size of an A4 sheet of paper with two coats using the mini brush. This will give you good coverage and a decent size of colour to be able to see whether your chosen colour is right for your room.

You can also pick up slightly larger tester pots in-store which give you enough paint to try the colour out in several places. This allows you to look at your colour under different lighting conditions, for example by the window, where it may seem lighter or under the stairs where it may look darker.