MacAdam ellipses

ellipses, MacAdam

Areas in the CIE chromaticity diagram, each in the form of an ellipse within which the colour appears the same. The size of each ellipse varies in the diagram, being larger for greens than for blues or reds. The ellipses are distorted for colour deficient individuals.
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Each bin will be sized to represent a total space no more than 3 MacAdam ellipses.
Philips Lumileds Implements Lumiramic Phosphor Technology as Part of Its Roadmap to Deliver a Supportable Supply of White LEDs for General Lighting
376, which specifies smaller four-step MacAdam ellipses for linear and some compact fluorescent lamps.
Seen side-by-side, however, two colors that are seven MacAdam ellipses apart are easily distinguishable.
The customer is always right: even with all the chatter surrounding OLEDs, proponents are well-advised to remember this simple maxim: people buy luminaires, not technology

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