Why does a metallic or sequined garment change colour as it moves?

Metallic threads and sequin facets reflect light directionally, similar to jewellery — as the garment or the wearer moves, different facets catch the light, so the visible colour and brightness genuinely change from moment to moment rather than staying fixed.

Macro close-up of overlapping dark silver sequins on fabric, catching light unevenly. — Each sequin acts as a tiny individual mirror — the fabric's overall colour and brightness depend on how many discs happen to be angled toward the light at once, which changes constantly with movement.

Metallic fabricSequins

What it affects

Sheen
Movement and highlights
Photography exaggeration

Practical advice

A single still photo captures only one moment of this effect — see the fabric in motion under real lighting before judging the colour.

Always confirm with the physical garment under real light before committing to a colour choice — see methodology.

Sources

CIE (International Commission on Illumination) publications — CIE