The more often you use a letter or number, the brighter the color you associate with it. No, it’s not a psychedelic experience, but a common link among people, called synaesthetes, who see vivid ...

People with color-grapheme synesthesia experience color when viewing written letters or numerals, usually with a particular color evoked by each grapheme (i.e., the letter 'A' evokes the color red).

When you hear the word love, does it taste like fresh ink and soft paper? When you see the number 4, does it burn a deep orange in your mind's eye? Does the letter E glow lime green above the page ...

In the 19th century, they called it “colored hearing”—letters and words, when spoken, took on mental weight and shimmered with color in the mind’s eye. For Miss C., who was interviewed in 1892, “n” ...