Suggestion - post over at the Home Decorating site and, if possible, post a picture along with your post. In the meantime, try this site for experimentation. You can choose house colors, shingle colors, door, trim etc. in a mix and match way. http://exteriorfx.owenscorning.com/exteriorfx/Welcome.do

North facing rooms will be dark most of the day and pick up purple tones from any paint. I would look carefully at the undertones and the formulas to ensure you don't have a lot of red and blue if you can't tell from the paint itself. I had a home with a north facing kitchen that I actually wanted to bring out the purple in so I purposefully went with a barely periwinkle gray that appeared full on periwinkle in that space. I suspect you don't want purple in your room. North facing rooms will also make your color appear deeper so you want something with a high light reflective value. My vote is for BM Gentle Cream.

I suggest you head over to this, and read what she has to offer about neutrals. this is the main page where you'll see tons of articles on paint colors. https://www.kylieminteriors.ca/category/the-best-paint-colours/neutral-gray-greige-cream-and-white/ this one is for the grays: https://www.kylieminteriors.ca/the-12-best-whole-home-gray-and-greige-paint-colours/ whites https://www.kylieminteriors.ca/the-5-best-almost-fool-proof-white-paint-colours-for-your-home/ North facing: https://www.kylieminteriors.ca/the-best-most-popular-benjamin-moore-paint-colours-north-facing-northern-exposure-rooms/ directions: https://www.kylieminteriors.ca/north-east-south-west-which-paint-colour-is-the-best/ Studio McGee did a room that matches your home style in 75% Swiss Coffee. You can see pics online. https://studio-mcgee.com/2019-5-15-cove-reveal-part-one-photo-tour/?rq=swiss%20coffee https://stylebyemilyhenderson.com/blog/best-white-gray-neutral-paint-colors without seeing your floors, your furniture, the style, it's kind of difficult to just throw out color names.

I like the teal accent color that we have (or something in the blue or green color family) and I think using a white for the trim would be good with the white window frames. It is the main color that I struggle with. I like the medium grey roof suggestion. We live in Colorado and the summer sun is brutal so I think a lighter color is good. We may have to cut a tree or two in front but the front landscaping is a future project. I want to replace remove the grass and xeriscape.