Generally, clothes do not need special markings. You can identify shirts, slacks, sweaters, jackets, skirts, dresses, etcetera, by the feel of the fabric, the style, buttons, and other features that vary from one garment to the next. Exceptions to this may be t-shirts or socks. If t-shirts of different colors are otherwise identical, the simplest means of distinguishing one from the other is to tear out the tag on one, leaving it in the other. It would also be possible to sew a small piece of fabric at the back of the neck.
Some blind people prefer to wear primarily one color of socks, all black, all white, all blue.
In many dime stores it is possible to buy small rings to use when doing the laundry to keep socks mated together. This makes sorting several colors of socks simple, since they should not get mixed together. Although it is possible to label almost anything in Braille or with raised markings, do not let yourself become a slave to such markings. You may find you really don't need very many.