What is the color for? The walls? New curtains? Furniture? What else is in the room?

What about a yellow or a purple?

With yellow... it's kinda beachy.

Its for the Curtain. My living room has chairs and a tv included

What I would do is take the colors in your room and find color schemes online that appeal to you. That's how I found the color scheme above, but I'm not sure I chose the right colors. Your room looks green in the photo but I think maybe it's white and just tinted green because of the lighting?

Or maybe post more pictures of the room with the existing furniture and others can jump in to help.