RGB Light
RGB light refers to the additive color model based on red, green, and blue wavelengths, which the human eye perceives and the brain combines to create the full spectrum of visible colors. This model forms the foundation of how digital displays—from screens to projectors—generate color by emitting light rather than reflecting it. The three primary wavelengths (approximately 700 nm for red, 546 nm for green, and 435 nm for blue) are mixed in varying intensities to simulate nearly all colors visible to human vision.
True Color versus Structural Color
True color and structural color represent fundamentally different physical mechanisms for producing perceived hues. True color results from the absorption and emission of light at specific wavelengths corresponding to pigments or dyes—RGB displays exemplify this principle by directly emitting photons at these wavelengths. Structural color, by contrast, arises from the physical arrangement of microscopic structures that interact with light through interference, diffraction, or scattering, creating colors without relying on wavelength-selective absorption.
Connection to Lippmann Photography
Lippmann photography demonstrates the relationship between these two color phenomena. This early color photography technique created color images through light interference patterns, capturing three-dimensional standing wave patterns within the photographic emulsion. The resulting images displayed structural color properties, with hues determined by the spacing of the interference layers rather than by traditional pigments, yet they could be viewed under white light without requiring RGB decomposition like later color photography processes.
Source Notes
- 2026-05-01: # Lippmann Photography and Structural Color: True Color vs. Illusion Generated: 2026-05-01 · API: Gemini 2.5 Flash · Modes: Summary --- Lippmann Photography and Structural Color: True Color vs. Illusion Clip title: This Photo Has No Color Author / channel: Steve Mould (Lippmann Photography and Structural Color: True Color vs. Illusion)