Thanks for the reply back. The next is my Lounge room and I have got blue colour couch and I have attached the pic. Pls have a look. I am thinking of doing Bold colour on the cardboard then then frame it with black or white colour or if there is any other suggestion pls suggest.

Where did you get the cardboards from? I love them.

Whatever you do with the cardboards, it should flow on into the living area. Since it is all so open, you need to keep the color theme united in both spaces. Use the blue or an accent color you like with the blue.

I would do the cardboard in red with stainless steel frame.

Hmmm good idea then I will do blue, yellow and orange colour on each of them. What say?

Honestly, I think they look great just the way they are. I'd have them mounted on a mat and framed. Maybe a deep blue mat, and a deep frame much like the picture that's over your sofa now, so that the texture of the boards show up against the dark mat.