The colour cyan - between green and blue - is a hidden factor in encouraging or preventing sleep, according to biologists. University of Manchester researchers say higher levels of cyan keep ...

The test maps colours in HSL (hue, saturation, lightness) space, focusing on hues between 150 and 210, which cover the blue-green spectrum. According to Mineault, most people's responses cluster ...

“This is interesting, because the nominal boundary between blue and green is at 180, the named HTML color cyan. That means most people’s boundaries are shifted toward saying that cyan is blue.” ...