Light & Optics Labλ = c / f • E = hf

550 nm to RGB & Color Calculator

Approximate how 550 nm monochromatic spectral light can be represented in sRGB, and calculate CIE 1931 tristimulus values, THz frequency, and photon energy.

CIE 1931 Spectral Synthesis
550 nm
Green
#22FF00
nm
380 nm (Violet)555 nm (Peak)750 nm (Deep Red)
Frequency
545.077 THz
Photon Energy
2.254 eV
sRGB Channels
34, 255, 0
CIE 1931 XYZ
0.4289, 0.9945

Why You See This Color (550 nm)

At 550 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 (545.077 THz, 2.254 eV) as brilliant emerald green to chartreuse, mapped here to digital sRGB gamut coordinates.

Physical Parameter Breakdown

Wavelength (λ):550 nm (550 × 10⁻⁹ m)
Oscillation Frequency (f):545.077 THz
Photon Quantum Energy (E):2.254 eV
CIE 1931 Tristimulus (XYZ):X:0.4289 Y:0.9945 Z:0.0088
Traian Anghel
Traian AnghelAuthor & Reviewer

Physics Teacher & Educational TechnologistBrăila, 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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