Here's an article that's worthwhile to read so you can understand how color works in darker rooms. I've looked through their suggestions and my personal choice would be Lucent Yellow but you may have a different one. Article on dark rooms

Here's another great color that won't look as bright as the photo but clear and clean and cozy. I love this. Picture it with your furniture. You can always buy samples and try them out. Remember what ever you paint them over will show through to some extent so do two coats.Sample

i just read this article about rooms with northern exposure and it makes so much sense. Best BM paints for Northern rooms

Get thee to a lamp store! You light the rooms using lamps - ceiling fixtures, table lamps, torchieres, uplights, lights over pictures, lights in cabinets. I see one fixture in your photos - the lamp over your dining table. That is not nearly enough.

You could put two narrow stick lamps on the shelf by the entry door. Put a table lamp on the side table near the fireplace. Put a torchiere to the left of the TV. For the torchiere, make sure the light bulb faces straight up, and then put a high-wattage flood light bulb in it. It will shoot light up to the ceiling and light much of the room. I would probably change out the dining room fixture to something more contemporary. Maybe you could put a sofa table behind the sofa and place a lamp on it - dicey, though, with kids. The lampsplus.com website isn't working for me today, so I don't have examples.

You might also paint the crown molding the same color as the walls which would make the ceilings look higher. I see your furniture is also dark. I would get pillows in light colors, aqua, light blue etc., trying for a fabric that has some sheen so it will reflect light. If a new sofa is in the budget I would definitely get one in a lighter color, with a stain repellent treatment applied by the manufacturer. Prints also hide stains better since you obviously have children. Even a slipcover in a light color would help. Lots of lights as stated above would definitely be a huge help.

I would not paint the trim the same as the wall.

I really like the Split Pea green in the article.

Ive decided to go with Behrs [Coastal Beige[(https://www.houzz.com/products/walls-coastal-beige-ppu7-13-prvw-vr~17409410) for the majority of the walls and maybe a bold red or orange similar to Behrs Tandoori or Morocco Red for an accent wall. I figured i could make the wall shared between the living room and dining the accent wall.

What are your thoughts?

I like the Moroccan better of the two reds but for some reason cannot view the Coastal Beige. For myself I admit I would not use beige because it's been so overdone for so many years that it's become a cliche. It's just a bit boring. How about a gray that has a very warm tone so that it's close to a beige and yet isn't perceived as beige? Sorry, I'm not a paint person and so can't direct you.

I just happened upon Behr Coastal Fog and at least on my monitor it looks like a very pretty and soft color. I imagine you could still do the one orange-red wall along with that color.