You can use attractive pillows and bed covers available in different sizes and shapes in the market. You can choose bed sheets and curtains perfectly coordinated with blue color with prints over it. White is the best color which can be used along with blue color while coloring the walls of the room in blue shade.
The key is about textures, you can add texture paint with strong blue lines over a lighter shade colored wall. Consider wardrobe color while choosing the color theme of the room if you are redesigning it without many changes in the furnishing of the room. One more point which needs to be considered while selecting the wall colors is the flooring shade if it is simple marble flooring then any shade can perfectly match with it.
You can collect ideas from various magazines which specialize in color and designing of the bedroom. Even check the catalogues of the paint manufacturers to get an b what is in trend nowadays and how to get a perfect look of the room with blue shades. The Internet is also a great source to gather blue bedroom ideas about room décor styles and tips. So change the theme of your bedroom in beautiful blue color easily.