A pair of gray pants is a standard in your closet, just like the black pants. It’s a basic, a staple, and it can save you when you don’t know what to wear. In some very formal business situations it is considered inappropriate to wear bold or “happy” colors. Professional attire doesn’t always have to stick to basic colors – far from it – but certain situations require a rather conservative look. You can get gray pants as part of a business pant suit, but also get a pair or two of separate gray pants. They match up with almost everything, but do pay attention to the fact there can be a slight blue, green or brown tone to the gray fabric. (It’s imporatant to keep that in mind when selecting the top.) Gray slacks can be worn with a classy white blouse, for example. Or with a stylish black top, as in the above photos. (These outfits seen at Banana Republic.)