Look at Smokey Green from benjamin Moore, Its a beautiful option when keeping the walls light.

I love blue ceilings in bedrooms

Of course!!!

Thank you so much Hibaou, Patricia and Oasis.
But I was thinking the ceiling should be tall for colouring the ceiling. Isn't it?Since the height of the ceiling is just 8.5 ft don't you guys think it will make the room smaller.
Fyi..rest of the furniture in the bedroom is white - wardrobe, bed , side tables
Plz help!

light blue ceiling with white wall and furniture definitely will give a cool effect