Pairs of subjects were shown a series of color slides in various shades of blue and asked to identify the colors.

NEWYORKER: Groupthink

He walked into the house, which is painted in various shades of blue and beige, except for the kitchen, which is a vibrant yellow.

NEWYORKER: The Face of Facebook

The GFP found in the Aequoria jellyfish produces some of its light when hit by ultraviolet light, some when hit by various shades of blue.

FORBES: Research