Group 1 - Yellow is a common color in nature, often associated with flowers and fruits, symbolizing hope and harvest [1][4] - The wavelength of yellow light is defined between 565 to 590 nanometers, making it highly visible and reflective [1] - In colder regions, yellow flowers are among the first to bloom, indicating the arrival of spring [1] Group 2 - Different civilizations have varied meanings associated with yellow, making it one of the most versatile colors [3][4] - In ancient Egypt, yellow was linked to gold, symbolizing immortality, and was used in wall paintings in tombs [7] - The use of yellow pigments dates back to early human civilizations, with yellow ochre being a common mineral pigment [3][4] Group 3 - In China, yellow has deep historical and cultural significance, initially being a color for lower social classes but later becoming associated with royalty [9][12] - The concept of yellow in the context of the Five Elements theory in ancient China elevated its status to that of a royal color [9][12] - The use of yellow in Japan mirrors that of China, where it is still considered a color reserved for the emperor [9] Group 4 - In Western culture, yellow has complex connotations, representing wealth due to its association with gold, but also betrayal and jealousy due to religious narratives [12][14] - The association of yellow with Jewish people during the Middle Ages and the Nazi regime highlights its use as a symbol of prejudice [14][16] - Artists like Vincent van Gogh embraced yellow in their works, using it to convey emotions and themes of resilience and beauty [18][20] Group 5 - The development of new pigment technologies in the 19th century allowed for more vibrant uses of yellow in art and media [22][24] - The emergence of "yellow journalism" in the late 19th century reflects the cultural significance of yellow in media and public perception [24][26] - In the food industry, yellow dyes enhance the visual appeal of products, linking color to consumer perception of taste [26][28]