Boys bedroom decor is becoming so cool now, gone are the days of it being dull & boring. By adding a few bright pops of colour can really make a statement. I adore the colour combination of navy blue, mixed with mustard yellow & red, it's such a great combination.
I like the idea of using blue as a base, as you can see navy blue has been used, some pale blue & turquoise. All look great when adding the mustard yellow & red.