Gray is the combination of black and white. It shows a dependability of someone who is keen into this color, of course. As for the interior of your house, you can mix it freely with other colors. It just goes well with any color you can find. Most of the time gray paint color schemes have been the best natural stone color to be used as the material of your fireplace. It would be another plus if you can gather all the gray stones. To add more natural look, you can mix the soft grey that comes from the stone with soft orange and the neutral colors, like cream or off-whites.
You can also pick the darker one of gray paint color schemes that you can use as the main background of your interior of the house. This time the darker gray tiles would be the best wall tiles for your bathroom. You can get Victorian style which combined with modern stuff like from the silver and metal bathroom appliances. Well, actually, the dark gray that you use is already representing the modern, urban look to your bathroom. Add more complimentary colors, like yellow and white as the colors of your powder desk or the round Victorian mirror style in your bathroom.
The weathered gray creates eclectic color scheme to your bedroom. The Rustic, weathered neutral mix with fuchsia and other electric hues can create the country-meets-city look. Of course the gray which becomes the delivery man to the city look. Blend it with some brown colors from the couch frame, Jute color, and sure, fuchsia. This muted palette helps you to curb the energy that created by the multicolor from your rug or something else in order to maintain a sophisticated balance in the space. Actually, it is not hard to blend gray paint color schemes into your interior of the house, since they are some easy colors, which willingly to have their seat wherever it is.