A more up to date chandeliere and a great centerpiece. Maybe a big crystal or ceramic bowl.

Replace the drapes with something with more of a pattern to give the room movement.

Agree, rug and new light fixture. You have lovely taste btw.

Maybe paint the gold mirror frame.

I agree with Jennifer, add a lovely rug with a little gray and color. Both the added color and texture will warm up your room and protect your floors! The gray curtains seem to lean towards blues. Maybe something like these?

Thoughts for a warm bold Color in the dining room? The drapes are kind of an acqua. Or should I paint walls white?

I think drapes are fine, just need to change lighting and wall color. If you don't like gray go with some aqua or grayish blue.

Many thanks sofikbr. I understand there are some sites where you can paint a room digitally and see the concept. I'll try.