Ok so I was thinking keep the walls white but maybe do a strip of light green going round the wall.
Then keep the white bedding but get a green blanket than you can fold half way down your bed, and have lots of blue and white or pink and white cushions. And have a few on your couch, too.
On the nightstand you could have lots of wee candles. You could also get a plain white bedside table light and then do 'the napkin technique' on it.
Basically you get a napkin and take only the very first layer that the design is printed on and then rip it or cut it into small pieces, which you then glue on. Don't forget to varnish it when your done
You could also put paintings on the wall, and omg omgggg I have an idea!!! haha ok well for your ceiling you could hang crystals from it!
Hope this is what you were looking for.