色丁（Satin），是一种用通常有光泽的表面，但却有暗沉背面的纺织品。色丁是一种以经线为主的织造技术，使织物的交织点保持在最低水平。一般来说，除了用棉之类的短纤纱线织成的会被称为棉缎以外，用其他材料，不管是丝线、尼龙还是涤纶，都可被称为色丁。用丝纺织的色丁即缎，但现时这并非必然。

一般的色丁织物都往往具有较高的光泽，那是因为织造色丁的纤维都有较多数量的浮动元素。这些浮动元素是指当纺织纤维在纺成纱线之时没有被裹进纱线里的松散纤维。这些浮动元素令色丁看起来表面更平滑，而且更亮丽。

Satin (/ˈsætən/) is a weave that typically has a glossy surface and a dull back. The satin weave is characterized by four or more fill or weft yarns floating over a warp yarn or vice versa, four warp yarns floating over a single weft yarn. Floats are missed interfacings, where the warp yarn lies on top of the weft in a warp-faced satin and where the weft yarn lies on top of the warp yarns in weft-faced satins. These floats explain the even sheen, as unlike in other weaves, the light reflecting is not scattered as much by the fibres, which have fewer tucks. Satin is usually a warp-faced weaving technique in which warp yarns are "floated" over weft yarns, although there are also weft-faced satins. If a fabric is formed with a satin weave using filament fibres such as silk, nylon, or polyester, the corresponding fabric is termed a satin, although some definitions insist that the fabric be made from silk. If the yarns used are short-staple yarns such as cotton, the fabric formed is considered a sateen.