What colours look nice with grey blue?

I recently completely redid my bedroom. I painted the walls a light grey blue. It's hard to explain but it looks like sky blue with a tint of grey in it. All of my bedroom furniture is white and I have a huge antique white wire bed. It's really pretty. My bed spread right now is navy and white but I don't like it anymore. I want to redo my room again because my taste has changed so much but I can't repaint my walls or change my furniture.

I'm thinking something colourful and kind of fun. Like a colourful quilt or something. What colours would look okay in my room? Or any other tips to redo my room without ACTUALLY redoing it. Like accents and stuff! Thank you in advance! I'm 16 by the way. :)