One of the visually appealing aspects of taffeta is the use of colour in the yarns taffeta in iridescent is colours used in woman's formal dresses and outerwear is especially popular iridescence is achieved by using different yarn colours in the warp and weft similar to chambray however the bright multifilament yarns reflect light differently as the fabric's angle to the light changes as the fabric moves its colour changes the fabric shown above is an example of iridescent colouring.