Carotenoids give the characteristic yellow color to autumn leaves, corn, canaries, daffodils, and lemons, as well as egg yolks, buttercups, and bananas.

[3] Sunlight has a slight yellowish hue when the Sun is near the horizon, due to atmospheric scattering of shorter wavelengths (green, blue, and violet).

Ochre and orpiment pigments were used to represent gold and skin color in Egyptian tombs, then in the murals in Roman villas.

The yellow on a color television or computer screen is created in a completely different way; by combining green and red light at the right level of intensity.

[13] Vincent van Gogh, an avid student of color theory, used combinations of yellow and purple in several of his paintings for the maximum contrast and harmony.

[14] Hunt defines that "two colors are complementary when it is possible to reproduce the tristimulus values of a specified achromatic stimulus by an additive mixture of these two stimuli.

[18] In commercial products diode pumped solid state (DPSS) technology is employed to create the yellow light.

A variant of this same DPSS technology using slightly different starting frequencies was made available in 2010, producing a wavelength of 589 nm, which is considered a true yellow color.

They serve two key roles in plants and algae: they absorb light energy for use in photosynthesis, and they protect the green chlorophyll from photodamage.

[3] In late summer, as daylight hours shorten and temperatures cool, the veins that carry fluids into and out of the leaf are gradually closed off.

Carotenoids are common in many living things; they give the characteristic color to carrots, maize, daffodils, rutabagas, buttercups and bananas.

Once picked, they begin to ripen; hormones in the bananas convert amino acids into ethylene gas, which stimulates the production of several enzymes.

The green chlorophyll supply is stopped and the yellow color of the carotenoids replaces it; eventually, as the enzymes continue their work, the cell walls break down and the bananas turn brown.

During the Post-Classical period, yellow became firmly established as the color of Judas Iscariot, the disciple who betrayed Jesus Christ, even though the Bible never describes his clothing.

In 16th-century Spain, those accused of heresy and who refused to renounce their views were compelled to come before the Spanish Inquisition dressed in a yellow cape.

Additionally, the symbol of three golden orbs is found in the coat of arms of the House of Medici, a famous fifteenth-century Italian dynasty of bankers and lenders.

[29] The 18th and 19th century saw the discovery and manufacture of synthetic pigments and dyes, which quickly replaced the traditional yellows made from arsenic, cow urine, and other substances.

Jews in Nazi Germany and German-occupied countries were required to sew yellow triangles with the star of David onto their clothing.

The Dutch modernist painter Piet Mondrian made a series of paintings which consisted of a pure white canvas with a grid of vertical and horizontal black lines and rectangles of yellow, red, and blue.

Because of its ability to be seen well from greater distances and at high speeds, yellow makes for the ideal color to be viewed from moving automobiles.

One example was The weather project, by Danish-Icelandic artist Olafur Eliasson, which was installed in the open space of the Turbine Hall of London's Tate Modern in 2003.

Eliasson used humidifiers to create a fine mist in the air via a mixture of sugar and water, as well as a semi-circular disc made up of hundreds of monochromatic lamps which radiated yellow light.

The ceiling of the hall was covered with a huge mirror, in which visitors could see themselves as tiny black shadows against a mass of light.

The color of the dyed fabric varies from deep red to orange to yellow, depending upon the type of saffron and the process.

Most saffron today comes from Iran, but it is also grown commercially in Spain, Italy and Kashmir in India, and as a boutique crop in New Zealand, the United Kingdom, France, Switzerland and other countries.

In the United States, because of concerns about possible health problems related to intolerance to tartrazine, its presence must be declared on food and drug product labels.

In a year 2000 survey, only 6% of respondents in Europe and America named it as their favorite color, compared with 45% for blue, 15% for green, 12% for red, and 10% for black.

Yellow has strong historical and cultural associations in China, where huáng (黃 or 黄) is the color of happiness, glory, and wisdom.

It was fashionable in ancient Greece for men and women to dye their hair yellow, or to spend time in the sun to bleach it.

[68] Yellow is the most visible color from a distance, so it is often used for objects that need to be seen, such as fire engines, road maintenance equipment, school buses and taxicabs.