To me the color Red-Orange signifies change. The change of dawn and dusk. The change of season, The change in temperature etc. Realgar is the Arabic name for Red-Orange.Red Orange natural pigment closely relates to the yellow natural pigment.The close family of Red-Orange are Vermillion( Cinnabar) and the Chinese-Red.
Red Orange in nature
Sunrise: A riot of red orange hues welcomes the new day
Sunset: The evening hues turn dark as night sets in.
Change of seasons in fall : Leaves symbolize seasons
Color of flowers heralding Spring : The flame of the forest is red orange
The boiling molten lava is red orange: Mother Earth’s inner core is in red orange flames
In all this the red orange symbolizes physical energy of change and more change.
The Atmosphere and Red-Orange
As a ray of white sunlight travels through the atmosphere to the eye, some of the colors are scattered out of the beam by air molecules,changing the final color of the beam that is seen. Colors with a shorter wavelength, such as blue and green, scatter more strongly, and are removed from the light that finally reaches the eye.At sunrise and sunset, when the path of the sunlight through the atmosphere to the eye is longest, the blue and green components are removed almost completely, leaving the longer wavelength orange and red light. Hence it is a color most seen in nature and becomes the key color of change.
Historical existence of Red-Orange
Studies show that the color red-orange dates back to the Paleolithic caves. There is evidence that this color has been found in cave paintings at Roucadour cave, Themines Quercy, Lot, France.
Cultural context of the color Red-Orange
1) The Golden Gate Bridge, one of the most famous bridges in the world, is well known for its fiery red color.This fiery red is actually Red-Orange or better known as “International Orange”.
2) Red orange as ‘Sindoor’ in the Indian context: Years of hoary history survive along with this color with has become a cultural and social symbol of marriage and purity.