@lqyna,
It depends on the style you want:
1. if you want to your room more fresh, you can choose light pink curtain, which also give you a bit feel like romantic.
2. Floral curtain with light color, it could create a rural style, feel simple and naturally. It is also a great choice
3. You'd better use curtain with light color, dark colour always make you feel like your room smaller that it is.