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It would help so much if you could show us photographs of your room from several angles. Without knowing what the space and furniture, and any other decorations, look like it's difficult to help.

Your art work looks like throw pillows. No need to add more pattern or color below it.

If your sofa is yellow, you probably don't want yellow pillows. If your sofa is gray, perhaps you would like a pop of yellow on the sofa. And if your idea is to hang that nice grouping of art OVER the sofa, then you probably don't want prints on your throw pillows (or at least, prints of the same scale/designs). I would focus on a couple of pillows that are simpler, but have great texture, such a velvet with some sheen to it, and a solid pillow with tassels. Maybe white, or black would be nice.

As for across the room over the TV, (you said "behind the tv", which sounds unusual, so not sure what that means), but if you have a wall like this with smaller grouped art, then I would choose something large for the opposite wall. Maybe a black and white or one of those liquid acrylic pour paintings, in your palette, like this:

Or, it might be better to go in a different direction than just the "modern" vibe of abstracts/patterns and go with something else. I came up with this, since it reminds me of a painting my SIL did.

You see how wildly different these are, and may not be right in your space. You haven't shown us your space, so don't know how "tight" your palette is, or whether your design style is more modern, or what. Are you a college student, or parent with a houseful of kids?