I can see where you are going. You want the bold pop of colour to enhance the browns. What has happened is you have gone a bit too DARK on the carpet and NOT DARK ENOUGH on the pillows. Believe it or not, I would switch out the depth of colour between the rug and the pillows. In your situation, a bound carpet is PERFECT for you. It allows you the size you need without having to deal with 'regular' sized area rugs. You can always look at a neutral colour carpet (boring) that has a WIDE binding in a FANTASTIC colour. You can have your cake and eat it too. The other thing that is 'missing' from your situation is a 3rd colour. Right now you have a monochromatic theme (which rates as ONE colour) with strong blue. In the design work that means you have only used 2 of the 3 colours in the 'three colour' rule. Here's how the 3 colour rule works: Main Colour: 60% Secondary colour: 30% Contrasting colour: !0% Right now I'm seeing 70% of the brown/white/black theme and then 30% of the blue. As pretty as it is...it is missing that last little bit of interest = 3rd colour. I would love to see a lemon/lime colour in here. Maybe a picture frame or a few vases placed around the room. You don't need much...but you need something.

You should post the photos because I don’t know how accurate are the links you have provided as regard to color.

try rugs.com and check the box 10 x 14

That is very exciting and you might want to do a gallery wall of his art on that dining room wall. Very special. You can research further and see what you can discover. Thanks for sharing. You might want to contact a local museum and see if they could recommend an appraiser so you could insure your pieces. Obviously, they are family heirlooms so protecting them is key. As a minimum take good photos of everything front and back in case of need to prove their value. Good luck.