There are plenty of ways to use purple so that it doesn't look like you're living in a palace. Check out the pictures below for some ideas.
Mixing deep purples and oatmeal neutrals against a deep, neutral wall creates a calm-looking space.
Experiment with different shades of purple so that the room doesn't look too saturated. Notice how the bedding and the curtains are completely different, but complementary hues.
Purple and green is a classic combination that works in many styles of decor. This cottage-style bedroom uses white painted wood and a cozy-looking quilt to achieve a homey look.
This room represents a completely different style, with the same color scheme. The purple and green combo still stands, but the stripes and bold wall color create a totally different look from the picture before. Notice how they use a softer shade of green for the chair as a complement.
For a younger bedroom style, try using purple with bright shades like pink and orange. The deeper hue grounds the rest of the colors and creates a great contrast.
Images via Flikr