We've all noticed the pervasive use of reds and yellows in restaurants, especially fast food chains, so there must be a good reason why. Here's what we know.

From left to right, red, green, gray and yellow panels deployed at the high elevation of the McMahons Point seawall, Sydney Harbor. The façade of this seawall, visible in the background, was ...

The vast majority of polished diamonds are clear and sparkly, but some come in unexpected colors like blue, green and even ...

And as one last point of interest, it is common to refer to red, yellow, green, blue, white, and black as being the psychological primaries , because we subjectively and instinctively believe that ...

The yellow light didn’t enter the scene until the 1920s. William Potts, who was a police officer in Detroit, is credited with designing the first three- and four-way colored traffic lights.

Why the traffic light colors were chosen There are a few reasons why the colors red, yellow and green were chosen for traffic lights. Red is an obvious choice.

From left to right, red, green, gray and yellow panels deployed at the high elevation of the McMahons Point seawall, Sydney Harbor. The façade of this seawall, visible in the background, was ...