Light & Optics Labλ = c / f • E = hf

675 nm to RGB & Color Calculator

Convert 675 nm monochromatic spectral light into exact digital sRGB, CIE 1931 tristimulus XYZ coordinates, THz frequency, and photon energy.

CIE 1931 Spectral Synthesis
675 nm
Red
#FF0021
nm
380 nm (Violet)555 nm (Peak)750 nm (Deep Red)
Frequency
444.137 THz
Photon Energy
1.837 eV
sRGB Channels
255, 0, 33
CIE 1931 XYZ
0.0557, 0.0264
Advertisement

Why You See This Color (675 nm)

At 675 nm, photons interact exclusively with Long-wavelength sensitive (L) photoreceptor opsins in the fovea centralis. With a frequency of 444.137 THz and lower photon energy (1.837 eV), this stimulus yields the deep, saturated red sensation of monochromatic ruby and diode lasers. Near the 700–750 nm boundary, eye sensitivity tapers toward the infrared threshold.

Physical Parameter Breakdown

Wavelength (λ):675 nm (675 × 10⁻⁹ m)
Oscillation Frequency (f):444.137 THz
Photon Quantum Energy (E):1.837 eV
CIE 1931 Tristimulus (XYZ):X:0.0557 Y:0.0264 Z:0
lightcontrast-checker Lab Verified

Datacolor SpyderX Pro

Calibrare monitor rapida cu lens-based color engine

Calibrare 2 min
Lens-based precis
Fara senzor ambiental
$169
4.7(3,421)
View on Amazon
Paid link • Amazon
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

Related Physics Calculators