Wave Lab
Light & Optics Labλ = c / f • E = hf

564 nm to RGB & Color Calculator

Convert 564 nm monochromatic spectral light into exact digital sRGB, CIE 1931 tristimulus XYZ coordinates, THz frequency, and photon energy.

CIE 1931 Spectral Synthesis
564 nm
Green
#CDFF00
nm
380 nm (Violet)555 nm (Peak)750 nm (Deep Red)
Frequency
531.547 THz
Photon Energy
2.198 eV
sRGB Channels
205, 255, 0
CIE 1931 XYZ
0.6692, 0.979
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Why You See This Color (564 nm)

At 564 nm, the radiation strikes the human retina close to the peak photopic sensitivity curve V(λ) (555 nm). Both M-cones (chlorolabe) and L-cones (erythrolabe) are strongly depolarized, maximizing luminous efficacy per watt of optical power. The visual system perceives this radiant energy (531.547 THz, 2.198 eV) as brilliant emerald green to chartreuse, mapped here to digital sRGB gamut coordinates.

Physical Parameter Breakdown

Wavelength (λ):564 nm (564 × 10⁻⁹ m)
Oscillation Frequency (f):531.547 THz
Photon Quantum Energy (E):2.198 eV
CIE 1931 Tristimulus (XYZ):X:0.6692 Y:0.979 Z:0.0024
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Traian Anghel
Traian AnghelAuthor & Reviewer

Physics Teacher & Educational Technologist • Brăila, Romania

Last Reviewed: August 2026
Wave Lab calculators are constructed using rigorous peer-reviewed physics formulas from verified metrological repositories. Every equation, spectral conversion, and acoustic property is tested against NIST, CIE, and ISO datasets.
Verified Sources:NIST CODATACIE 1931 2° ObserverNASA Glenn Research

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