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Colors | Yellow


Claude Monet | Yellow Irises, 1917
Yellow is the color between orange and green on the spectrum of visible light.
It is evoked by light with a dominant wavelength of roughly 570-590 nm.
It is a primary color in subtractive color systems, used in painting or color printing.
In the RGB color model, used to create colors on television and computer screens, yellow is a secondary color made by combining red and green at equal intensity.
Carotenoids give the characteristic yellow color to autumn leaves, corn, canaries, daffodils, and lemons, as well as egg yolks, buttercups, and bananas.
They absorb light energy and protect plants from photodamage.
Sunlight has a slight yellowish hue when sun is near a horizon, due to atmosphere scattering shorter wavelengths (green, blue, and violet).


Because it was widely available, yellow ochre pigment was one of the first colors used in art; the Lascaux cave in France has a painting of a yellow horse 17,000 years old.
Ochre and orpiment pigments were used to represent gold and skin color in Egyptian tombs, then in the murals in Roman villas.
In the early Christian church, yellow was the color associated with the Pope and the golden keys of the Kingdom, but was also associated with Judas Iscariot and was used to mark heretics.
In the 20th century, Jews in Nazi-occupied Europe were forced to wear a yellow star.
In China, bright yellow was the color of the Middle Kingdom, and could be worn only by the Emperor and his household; special guests were welcomed on a yellow carpet.
According to surveys in Europe, Canada, and the United States, yellow is the color people most often associate with amusement, gentleness, humor, and spontaneity, but also with duplicity, envy, jealousy, avarice, and, in the U.S., with cowardice.
In Iran it has connotations of pallor/sickness, but also wisdom and connection.
In China and many Asian countries, it is seen as the color of happiness, glory, harmony and wisdom.

Frederick Carl Frieseke | Yellow Room, 1910

Giotto | The Kiss of Judas, 1304-06

Jan Lievens | Young Man in a Yellow Robe, 1630-1631

Jean Honore Fragonard | A Young Girl Reading (or The Reader), 1776 | National Gallery of Art, Washington

Mosaic of Justinianus I Basilica San Vitale, Ravenna







Giallo - Coordinate del colore
                                           
HEX - #FFFF00
RGB1 - (255; 255; 0)
CMYK2 - (0; 0; 100; 0)
HSV (60°; 100%; 100%)
1: normalizzato a [0-255] (byte)
2: normalizzato a [0-100] (%)

Il giallo è uno dei colori dello spettro che l'uomo riesce a vedere. Ha la lunghezza d'onda compresa tra 565 e 590 nanometri.
È uno dei tre colori primari sottrattivi, insieme al ciano ed al magenta, il suo colore complementare è il viola.
Tuttavia, a causa delle caratteristiche dei pigmenti utilizzati anticamente, tradizionalmente nella pittura il colore complementare viene identificato con il porpora.
Dal punto di vista etimologico in italiano la parola giallo deriva dal francese antico jalne a sua volta derivante dal latino gălbĭnum derivato di gălbus con significato di 'verde-giallo'.

Johannes Vermeer | The Milkmaid, 1658

Vincent van Gogh - Sunflowers, 1888

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