Color Science Basics: Light, Perception, and Digital Color
The science behind color: electromagnetic spectrum, human eye cones, and how digital systems approximate human color perception for screens.
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Tags: color, theory, design
Color Science Basics: Light, Perception, and Digital Color Color doesn't exist in the physical world in the way we intuitively think it does. A tomato isn't red — it reflects wavelengths of light that your visual system interprets as red. Digital screens don't produce "purple" — they emit calibrated amounts of red and blue light that your brain fuses into the perception of purple. Color is a biological phenomenon as much as a physical one. Understanding this changes how you approach design decisions, debug color rendering issues, and reason about why color management systems exist at all. Light and the Electromagnetic Spectrum Visible light is electromagnetic radiation with wavelengths roughly between 380 nm and 700 nm. Below that range is ultraviolet (invisible to humans, though some…
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