Also spelled gray (both are correct), it is tint of shades that range from white to black.  Grey is also known as a monochromatic or neutral color.

A psychological analsyis of the colors starts with the fact that grey is somewhere between white (good) and black (evil). It can symbolize elegance, humility, respect, reverence, stability, wisdom, old age, pessimism, boredom, decay, mourning, pollution, urban sprawl, subtlety, balance, neutrality, and formality.

MJTrends offers the following fabrics in shades of gray:

http://www.mjtrends.com/categories-PVC,Fabric