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.
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.
Photo: “Sequins macro” by liz west, CC BY 2.0, via Wikimedia Commons.
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
Why it looks the way it does
Metallic fabrics carry a real mirror in the yarn: lamé wraps a thin metal or metallised-film ribbon around a core fibre, and sequins are small discs of plastic or film, some faceted to throw more light. Each tiny mirror reflects a light source only when it faces between the lamp and your eye, so the garment shows a scatter of very bright points against a darker, dye-coloured base, and the pattern of points jumps as the wearer moves. Most metallised films are coloured by a tinted coating over a reflective layer, so the 'metal' can be any hue.
Wear and care: Metal films can crack or rub off at folds and seams, and older real-metal threads can tarnish, dulling highlights; sequins lose their coating and turn cloudy or clear where they rub.
What changes it
- The number and size of light sources — a single spotlight gives crisp sparkle, diffuse daylight a softer sheen
- Movement, since each facet reflects only at particular angles
- Camera exposure, which often clips the highlights to pure white
Common mistakes
- Choosing an evening piece under bright, diffuse shop lighting, where it looks flat
- Relying on a still photo that has frozen one arrangement of highlights
Try this
- View the fabric under a single small light source, similar to evening lighting, and move it
- Take a short video rather than a photo to judge the effect
Read more
Sources: Lamé (fabric); Sequin