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APHA color, also referred to as the Hazen scale, and more appropriately as the Platinum Cobalt(Pt/Co) scale, [1] is a color standard named for the American Public Health Association and defined by ASTM D1209. [2] It was originally intended to describe the color of waste water, but its usage has expanded to include other industrial applications ...
Single-level Comet IB and Horizon cars used on the San Joaquin have a yellow bottom stripe and a navy blue window stripe with orange, turquoise, and light blue accents. Several NPCUs used for the service are gray with turquoise and light blue stripes and a curve towards the top rear of the locomotive, red chevron stripes on the front (a nod to ...
The Platinum-Cobalt Scale (Pt/Co scale or Apha-Hazen Scale) is a color scale that was introduced in 1892 by chemist Allen Hazen (1869–1930). The index was developed as a way to evaluate pollution levels in waste water. It has since expanded to a common method of comparison of the intensity of yellow-tinted samples.
The color box at right shows the most intense yellow representable in 8-bit RGB color model; yellow is a secondary color in an additive RGB space. This color is also called color wheel yellow . It is at precisely 60 degrees on the HSV color wheel , also known as the RGB color wheel ( Image of RGB color wheel: ).
The colours are either active or traditional. An active colour belongs to a brigade or an equivalent unit in the FDF. A traditional Colour belongs to a battalion or a regiment that has formerly been separate, but is now part of a brigade. The difference between an active and traditional Colour is the way of presenting them.
The word yellow is from the Old English geolu, geolwe (oblique case), meaning "yellow, and yellowish", derived from the Proto-Germanic word gelwaz "yellow". It has the same Indo-European base, gel-, as the words gold and yell; gʰel-means both bright and gleaming, and to cry out.
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