Great colour choices! I agree to go with the grey rug, but you can use the yellow as a subtle highlight colour in the design. Here is a photo of our Clover rug in grey and cream , but you could easily make the cream a light yellow. At Tsar we custom make rugs to the exact right size and colour combination to ensure you get it 100% right. Have a look at tsar.com.au. We'd be happy to assist.

The room looks lovely. The rug is too light in fabric weight - it could be dangerous if someone caught their toe under it. And as mentioned by others - you need some colour. I know that it is advised by some people that a mat should go under the furniture, however, that is not always possible.

If you like round rug then go round rug. Will suit your gorgeous chair. Just make it large enough for legs of sofa and chair to sit on.

I think it's fine without a rug. I think rugs are good when it's a large open area and it helps you define spaces. This dining area is well defined without needing a rug