That is a very vague question. Let's start with what colors do you like and don't like and what colors are used in your home.

Reds are supposed to stimulate the appetite. :-)

Green can be a great hue for the dining room. It is considered to be the new neutral and can be paired with so many other colors! Depending on the shade of green you select, it can evoke feelings of ease and relaxation or energy and freshness. Green also complements most palettes, making meals more appetizing. Red is also a color used in dining areas because it increase's a person's appetite.
Also remember when selecting paint colors for the room you need to be mindful of adjacent spaces and those area's colors.
Good luck with your paint selection! Hope this helps!

Most of my house is beige. Dining table and chairs are dark brOwn. I was thinking pale yellow and then rectangular and square moldings. High ceilings and 1 north facing window. Not sure how yellow will look next to beige as they will be next to each other as the wall angles out at about 45 degree angle

I would forget the yellow DR. How about beige on top to tie in adjoining rooms and bottom moldings in white.