Sometimes adding a strong color can feel a little daunting but it can really tie your color scheme together. The easiest way to start is to do a small wall or section first and live it for a while. Look at it in different light levels and make sure you are happy with it, the great thing about paint is that it is easy to get rid of if you really don’t like it!
Look at the example here, a really glamorous bathroom made more so with the infusion of purple on the wall, the accent color is carried through into the plant and also the tile grout on the wall. If you are going to use an accent color try to use one or two at the most, anything else just starts to look busy and unorganized. But play with color and have fun with it!