Below examples showcase embedded lines of seemingly different colours. The reason they look different is because our brain judges the colour of an object by comparing it to surrounding colours. So without us even knowing it, in first example, our brains compare the flowing red stripes to the yellow stripes, forcing us to think they are orange. The blue stripes make the red ones appear much darker -almost purple, even though they are exactly the same colour! This is just one of the examples why you cannot trust what you see even with your own eyes. Next time someone swears they saw Jesus, UFO, or a ghost, show them this animation.
“Hue is one of the main properties of a colour, defined technically as “the degree to which a stimulus can be described as similar to or different from stimuli that are described as red, green, blue, and yellow” (those beeing the unique hues). The other main correlatives of colour appearance are colorfulness, chroma, saturation, lightness, and brightness.”
“In painting colour theory, a hue refers to a pure colour—one without tint or shade (added white or black pigment, respectively). A hue is also an element of the colour wheel. Hues are first processed in the brain in areas in the extended V4 called globs.”