Decorating an adult bedroom design is a different thing than designing a room for a kids. An adult is a mature person, likewise the interior has to be done with a mature approach as well. You might be wondering as what you can do to achieve the maturity factor in the bedroom interior, the answer lies in the selection of the colors.
The furnishing and curtains in an adult bedroom should be chosen in pink, purple and any other color that has something to do with feminism. Ask the person for whom you are decorating the bedroom, they must have their choice and liking as well, they may give better suggestions on how to initiate the project and what to include in the room for making it a wonderful place.
These days theme based and Hollywood character oriented bedroom designs are in trends a lot, so if the adult person has interest in anything like such you can design the bedroom accordingly.