Take the curtain rod till the ceiling. It will give you an elevated look of your space. Before choosing the curtain , the position of it is important.

I would get rid of the glass shelves and install curtain tracks on the ceiling to give it height and take your eyes upwards. If there is no pop-up Kulla in the living room, then I would go with a pastel shade or patterned lightweight fabric or if you’re looking for a neutral then off-white.

I see a blue molded wall ceiling, and it appears to be a living room with a wooden chair in front. We can consider using a cotton-printed blind with a nature-themed design preferably with blue background. The blind serves two purposes:

1. It can be rolled up to let in natural light and air, enhancing the space's openness.
2. When rolled up, it avoids overlapping with the chair in front, maintaining a clean look.

Additionally, the art piece behind the sofa will act as a stronger statement feature, ensuring the blind complements rather than competes with the overall design.