Find the curtains and rug that you love. Choose paint colors from the color scheme. It is a lot easier for the paint to match the decor than to find decor to match the paint.

Hardwood floors, may add an area rug, possibly white or blue. Curtains are currently off-white, but may change those. Furniture is mahogany.

It is hard to say. I would need to know the colors in your rug, curtains, furniture. What is your color scheme?

For a bedroom: dark blue (navy-ish) accent wall, should other walls be gray or white?