Wherever I see the color ’4,’ it glows orange in my mind’s eye. I still see it as black on a white page but I know, somewhere deep down, that it’s really orange. It’s the same way I know that 7 is ...

TikTokers with synesthesia have stirred up a trend linking colors to names. And now, even people who don't have the condition can get in on the action. According to Psychology Today, synesthesia is a ...

Synesthesia is a condition in which sensory input from one cognitive stream gives rise to experience in another unstimulated cognitive stream. The most common forms of synesthesia include ...