How must Dhimmis distinguish themselves from Muslims regarding clothing?

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Dhimmis must wear clothing whose color distinguishes them from the general Muslim populace. For Jews, this involves wearing a yellowish color (al-'Usali), and for Christians, a dark color (al-Adkan or al-Fākhti). This distinction must be evident in at least one garment to establish difference. They must further wear a distinguishing girdle (Zunnār) over their clothing if Christian, or use another marker, such as a piece of cloth of contrasting color attached to their turban or cap. For identification in public baths, they must wear a lead or iron seal, or a bell, around their necks. Their women must wear colored garments and wear the girdle underneath their clothing, and also be sealed around the neck.