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2. Helmholtz–Kohlrausch effect - Wikipedia

   en.wikipedia.org/wiki/Helmholtz–Kohlrausch_effect

   Each color on top has approximately the same luminance level and yet they do not appear equally bright or dark. The yellow (second from the left) appears to be much darker than the magenta (right-most). However, when the top image is converted to grayscale, we have the image on the bottom--a single shade of gray.

3. CIE 1931 color space - Wikipedia

   en.wikipedia.org/wiki/CIE_1931_color_space

   A comparison between a typical normalized M cone's spectral sensitivity and the CIE 1931 luminosity function for a standard observer in photopic vision. In the CIE 1931 model, Y is the luminance, Z is quasi-equal to blue (of CIE RGB), and X is a mix of the three CIE RGB curves chosen to be nonnegative (see § Definition of the CIE XYZ color space).

4. Dominant wavelength - Wikipedia

   en.wikipedia.org/wiki/Dominant_wavelength

   The Helmholtz coordinates are a polar coordinate system for defining a 2D chromaticity plane. The circumferential coordinate is the dominant wavelength, which is analogous to hue of the HSV color space. The radial coordinate is the purity, which is analogous to saturation of the HSV color space. [2]

5. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

6. Practical Color Coordinate System - Wikipedia

   en.wikipedia.org/wiki/Practical_Color_Coordinate...

   (Top) 1 References. Toggle the table of contents. ... The Practical Color Coordinate System (PCCS) is a discrete color space indexed by hue and tone.

7. Woman Wins Lotto — Then Her Boyfriend Calls Her ... - AOL

   www.aol.com/woman-wins-lotto-then-her-185808297.html

   A woman’s lotto dreams came true — but also caused some issues with her boyfriend. The woman, 25, posted to Reddit anonymously to ask for advice about her recent victory. She wrote, “I ...

8. Search underway for Michigan woman, 66, who disappeared ... - AOL

   www.aol.com/search-underway-michigan-woman-66...

   An active search is underway for a 66-year-old Michigan woman who disappeared from a popular tourist hot spot during a trip to the Grand Canyon more than a week ago, officials said.

9. What is St. Nicholas Day? How the German and Dutch holiday ...

   www.aol.com/st-nicholas-day-german-dutch...

   Dec. 4, 2022; Columbus, Ohio, USA; Shoes are set out in the hopes of them being filled with sweets for St. Nicholas Day during the Ohio History Connection's annual Dickens of a Christmas event ...