Holographic Foil Texture in Cobalt and Ultramarine Blue

close-up photo of smooth holographic foil filling the entire frame, gently undulating with soft vertical folds, deep cobalt and ultramarine blue dominating, dark gunmetal silver areas, vivid spectral bands of cyan, emerald green, acid yellow, tangerine orange and violet flowing in smooth diagonal gradients, oil-slick thin-film iridescence, glossy mirror-like sheen, bright specular highlight along one edge, soft natural light, slightly soft focus