The Best way to do that is to take pictures of existing furniture, the wall, and decor items you would like to integrate. Create a pallette. Sample shown below.
In pink rooms, pink roses are a must. Have them in very many places throughout the room. They do not need to be bright pink and they can be a more subtle shade of pink. Have them in vases on the table stands. Have them in pictures that you hang on the wall. Be sure that you also have some white items in your pink room also. White is an excellent color to accentuate the pink.
Black and white looks softer with flashes of pink, and chocolate brown with shocking pink is a fabulously rich combination.
Also, by adding other hues like yellow or gray, you can soften or morph the color to be pink with an attitude of peach and fool the eye.
Some fab houses in pink ..
and in peach ..
Image courtesy : entheosweb.com, @Home