620 nm to RGB & Color Calculator
620 nm light is near the orange–red boundary. View an approximate screen color and calculate its optical frequency and photon energy.
What color is 620 nm light?
620 nm lies near the orange–red boundary of the visible spectrum. Color names describe approximate regions, so references may call it orange, orange-red or red. The calculator's broad wavelength bands label it orange; this is not a sharp physical boundary.
A display cannot reproduce a single spectral wavelength exactly. The preview #FF003A (RGB 255, 0, 58) is this model's gamut-mapped sRGB approximation. It is not a universal hex code for 620 nm, nor does matching the screen color identify a lamp's wavelength.
For light in vacuum, convert 620 nm to 6.20 × 10⁻⁷ m, then use f = c / λ. The result is approximately 483.536 THz; each photon carries approximately 2 eV. This optical frequency is different from the electrical modulation frequency of an LED.
For context, see NASA's visible-light overview and our guide to wavelength and color.
Why You See This Color (620 nm)
At 620 nm, long-wavelength-sensitive cones respond more strongly than short-wavelength-sensitive cones. Cone responses overlap, and perceived color depends on their relative signals and viewing conditions; there is no abrupt biological switch between orange and red.
Physical Parameter Breakdown
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