Metamerism
The phenomenon where two colors appear identical under one lighting condition but visibly different under another.
What it means
Metamerism occurs because different combinations of wavelengths can produce the same perceived color. Two fabric samples might look perfectly matched under office fluorescent lights but obviously different in daylight. This happens because their spectral reflectance curves are different — they reflect different wavelengths but happen to stimulate your eye's cones identically under one specific light source.
In digital design, metamerism is less about lighting (screens emit their own light) and more about display differences: a color that looks identical on two monitors with different gamuts, panel technologies, or calibrations may appear different because the displays reproduce the same hex value with different actual light output.
Why it matters in palette design
If you design a palette on a wide-gamut P3 display and your users view it on standard sRGB monitors, some colors may shift. Similarly, brand colors that look correct on screen may not match printed materials viewed under different lighting. PerfectPalette's gamut-safe export helps mitigate the digital side of this — but true metamerism across physical media requires testing colors in their intended viewing conditions.
Example
A brand specifies a particular teal (#2DD4BF) for both web and printed packaging. On screen, it looks perfect. Under warm store lighting, the printed teal shifts noticeably greener because the ink's spectral reflectance interacts differently with warm (yellow-heavy) light than with the daylight-balanced screen emission.
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Apply this to your palette
Open PerfectPalette and put these concepts into practice with your own colors.