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Blue is a primary color across all models of color space. It is the color of the ocean and the sky ; it often symbolizes serenity , stability , inspiration , or wisdom . [9] It can be a calming color, and symbolize reliability. [10]
Blue in culture. Goblet from Mesopotamia, 1500–1300 BC glazed with Egyptian blue. This was the first synthetic blue, first made in about 2500 BC. The color blue has been important in culture, politics, art and fashion since ancient times. Blue was used in ancient Egypt for jewelry and ornament. [1]
The color defined as blue in the RGB color model, X11 blue, is the brightest possible blue that can be reproduced on a computer screen, and is the color named blue in X11. It is one of the three primary colors used in the RGB color space , along with red and green .
Darker shades of blue include ultramarine, cobalt blue, navy blue, and Prussian blue; while lighter tints include sky blue, azure, and Egyptian blue (for a more complete list see the List of colours).
Both square test areas in the upper area of the card show the intense blue color of a positive result. The lower two smaller circular areas on the orange stripe are analytical control reactions, positive on the left and negative on the right, that help assure that the card and developer bottle have been maintained in proper conditions and have ...
From light blue to navy blue, these inviting kitchens prove that a blue kitchen is always timeless.
Color theory, or more specifically traditional color theory, is the historical body of knowledge describing the behavior of colors, namely in color mixing, color contrast effects, color harmony, color schemes and color symbolism.
Unlike electric charge, color charge is never observed in nature: in all cases, red, green, and blue (or anti-red, anti-green, and anti-blue) or any color and its anti-color combine to form a "color-neutral" system.
An LB agar plate showing the result of a blue–white screen. The blue–white screen is a screening technique that allows for the rapid and convenient detection of recombinant bacteria in vector -based molecular cloning experiments.
As vaginal pH normally is acidic, the blue color indicates the presence of amniotic fluid. The test may be false-positive in the presence of other alkaline substances such as blood or semen , or in the presence of bacterial vaginosis .