Visual Lab experiment
Adjust a synthetic HSL palette and contrast spread to see how controlled color relationships change without pretending to model the optics of opal, butterfly scales, feldspar or glass.
Default state: H 210°, S 70%, L 55%, contrast spread 50%. Five synthetic swatches are derived around that center. This illustrates controlled palette relationships only.
Need grounded optics, colorimetry and perception models rather than only synthetic HSL relationships? ICUX-005 adds 16 source-visible demonstrations and keeps browser approximation limits explicit.
Reviewed BVU context
These entries provide reviewed source/provenance context. Their media and claims are not rewritten by the controls above.
Reviewed context · not transformed evidence
Labradorite can flash bands of blue, green and other colors as its orientation to light changes.
Source/provenance context: Smithsonian National Museum of Natural History; Gemological Institute of America
Reviewed context · not transformed evidence
A Wollo opal can break light into shifting spectral patches known as play-of-color.
Source/provenance context: Smithsonian National Museum of Natural History; Gemological Institute of America
Reviewed context · not transformed evidence
A blue morpho butterfly produces brilliant blue through microscopic wing-scale structure rather than blue pigment alone.
Source/provenance context: Smithsonian National Museum of Natural History; Smithsonian Institution
Reviewed context · not transformed evidence
Tiffany Favrile glass uses surface color, transparency and finish to make a vessel change character with light.
Source/provenance context: The Metropolitan Museum of Art
Practice on reviewed subjects
The lab is synthetic practice. These subject links show where the same reading question matters in reviewed BVU records without changing the record itself.
Connected discovery
This experiment is non-commercial and non-sponsored. Its state never creates canonical relationships.
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