Light & Optics Labλ = c / f • E = hf

445 nm to RGB & Color Calculator

Approximate how 445 nm monochromatic spectral light can be represented in sRGB, and calculate CIE 1931 tristimulus values, THz frequency, and photon energy.

CIE 1931 Spectral Synthesis
445 nm
Violet
#8100FF
nm
380 nm (Violet)555 nm (Peak)750 nm (Deep Red)
Frequency
673.691 THz
Photon Energy
2.786 eV
sRGB Channels
129, 0, 255
CIE 1931 XYZ
0.3585, 0.0252

Why You See This Color (445 nm)

At 445 nm, monochromatic light stimulates human Short-wavelength (S) retinal cone photoreceptors with minimal activation of Medium (M) and Long (L) cones. The brain interprets this high-frequency electromagnetic stimulus (approximately 673.691 THz, carrying 2.786 eV per quantum photon) as deep violet. Because the eye's photopic luminous efficiency V(λ) drops sharply toward the near-ultraviolet threshold, this wavelength requires greater radiant flux to match the perceived brightness of green light.

Physical Parameter Breakdown

Wavelength (λ):445 nm (445 × 10⁻⁹ m)
Oscillation Frequency (f):673.691 THz
Photon Quantum Energy (E):2.786 eV
CIE 1931 Tristimulus (XYZ):X:0.3585 Y:0.0252 Z:1.7764
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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