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.

What is the difference between an Oriental rug and a Persian rug?

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