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Invariant hues

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In color perception Invariant hues (or invariable hues [1]) are perceived[ [hues]] of monochromatic light that do not change with intensity, that do not show the Bezold–Brücke shift, that is, do not change with changes in illumination.

There are four invariant hues: blue, green, yellow, and red&nbsp The four invariant hues are:

  • 478nm (blue)
  • 510nm (green) [2][3]
  • 578nm (yellow)
  • 493c (red; i.e. complementary wavelength to 493nm)[4]

References

  1. Reber, A.S. & Reber, E.S.(2001) The Penguin Dictionary of Psychology
  2. Pridmore, R.W. (1999)."Bezold-Brucke hue-shift as functions of luminance level, luminance ratio ....etc" .Vision Research ;39:3873-3891.
  3. Kuehni,R. (2004) "Variability in unique hue selection: A surprising phenomenon." Color Research & Applic ; 29:158-162
  4. Pridmore, R.W. (1999)."Bezold-Brucke hue-shift as functions of luminance level, luminance ratio ....etc" .Vision Research ;39:3873-3891.

Further reading

Pridmore, R.W (1999). "Unique and binary hues as functions of luminance and illuminant color temperature, and relations with invariant hues." Vision Research ;39:3892-3908.

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