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In printing, registration black is a black color that includes 100% of each of the process colors used. Typically these are cyan, magenta, yellow and black , [4] but if different colors are used, registration black marks are made with all of the colorants (inks). [4] Registration black is used for printing crop marks and registration marks ...
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In the CIE XYZ and RGB color spaces, the saturation is defined in terms of additive color mixing, and has the property of being proportional to any scaling centered at white or the white point illuminant. However, both color spaces are non-linear in terms of psychovisually perceived color differences. It is also possible — and sometimes ...
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On March 30 and 31, 2012, in the course of earth hour, the site used a light-on-dark color scheme (or "dark theme"). A switch was located left to the video title, allowing to toggle back if desired. This is the earliest known use of a light-on-dark color scheme on the site.
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This was the first serious effort to form a labor institution for employees of the Pullman Company, a major employer of African Americans. The railroads had dramatically expanded in the early 20th century, and the jobs offered relatively good employment at a time of widespread racial discrimination.
Zitkala-Ša with her violin in 1898. Zitkala-Ša was born on February 22, 1876, on the Yankton Indian Reservation in South Dakota.She was raised by her mother, Ellen Simmons, whose Dakota name was Thaté Iyóhiwiŋ (Every Wind or Reaches for the Wind).