Choose a soft color because stronger ones will make the space smaller. I would use an off white or cream. That way te color in the room will relect the lighting and not give your fabric a tint.

Cream! Happy and easy on the eyes!

I used to have a pale yellow sewing room with white trim and white ceiling. It was such a happy place to be!

My sewing room (in the basement) has almost no natural light but does have good full-spectrum fluorescent overhead and task lights, halogen lights, and incandescent lights. I chose a cream/light beige color for the walls and shelves, and I've been very happy with it. It brightens up the space and does not detract from or compete with any quilts being done there. The flooring is industrial vinyl in a light beige and, surprisingly, it does not get that dirty. The ceiling is white.

Much of my furniture is custom-made oak, which the wall color shows off, and I also have some darker cabinets with machines in them. The quilts hanging in that room or on the design wall or sewing tables are seen for their own colors and the wall color fades into the background, as I think it should.

Yellow would be my second choice. I did use a cheerful yellow with white trim on the walls of the bathroom and laundry room, which is adjacent to the sewing room.

Since this is the one criteria you've given (not how it makes you feel, or your favorite color) I would suggest what the photographer mentioned (#25), grey in a very light shade. It is an industrial color and often used in art galeries because it doesn't compete with the art. It is an equal collection of the primary colors. so it reflects light equally in all colors so it doesn't affect the appearance of colors in it. White can overpower color.

Copngrats on your new room! I painted mine pale yellow.

Thanks everyone! I am going to bring some samples from the hardware store. I think cream, light grey or light yellow. My room has lights in each corner shinning in the middle. The middle is going to be a light and a fan. There is a window in the room also.

Mine is yellow and I love it, yellow carpet too.