While its important not to go over the top, a well-presented dining room will always have an injection of colour. It doesnt have to be bright yellow. It could be a subtle light green with matching curtains that have a pop of pink in them.
As a longtime apartment-dweller, I’ve found that the visual weight of a piece of furniture can really influence how big it feels in a room. It may technically fit, but it’ll seem huge if it’s a dark or bulky piece or if it’s too close