There is something unique about the color purple: Our brain makes it up. So you might just call purple a pigment of our imagination. –Tammy Awtry, Science News Explores, Jan. 28, 2025
Purple is the sweetness of plums, the promise of spring in wild hyacinth, and the richness of royal robes. It’s my mother’s favorite color and the 2018 Pantone Color of the Year. But is it really just a pigment of our imagination? Yes, writes science reporter Tammy Awtry who marvels at “how the brain creates something beautiful when faced with a systems error.”
Although I confess to not deeply understanding the science behind this, I understand the basics. The backs of our eyes contain light-sensitive cells called cones, and this is where we perceive color. Most people have three cone types: red, green, and blue. Our cones don’t actually see color, but they do detect certain light wavelengths, long, mid, or short. Light enters our eyes, and when a combination of codes are activated, this, in turn, creates another code, which our brains translates as a color. Colors in the visible rainbow are created by single wavelengths of light stimulating a certain combination of cones. At the red end of the color spectrum, long wavelengths are at work, while at the blue end, short wavelengths operate. There is no spectrum color, however, created by combining long and short wavelengths. Purple, then, confuses our brains because it’s a mixture of long and short wavelengths. Amazingly, our brain’s response is to bend the visible spectrum–a straight line–into a circle, thereby placing blue and red directly next to each other and filling the gap between them with purple.
Colors that are visible in the spectrum are identified as spectral colors. Colors that are not are called nonspectral colors, for they’re uniquely created from combining a short and long wavelength. Purple, writes Awtry, “arises from a unique quirk of how we process light. And it’s a beautiful example of how our brains respond when faced with something out of the norm.”
Not to be confused with violet, which is more blue, purple is more reddish. It’s only visible naturally on birds, fish, and some plants. In the past, people could harvest just a small amount of Tyrian purple dye from a certain shellfish species, making purple a unique and highly valued hue. Writers and artists have long recognized purple’s magical qualities. Irish playwright and critic George Bernard Shaw believed purple was a hue “where fantasy and reality meet to create something extraordinary.” Artist Vincent Van Gogh claimed, “There’s a kind of magic in the purple shadows of dusk.” Purple may be a creation of our minds, but perhaps this has only heightened its allure.
For many, purple is synonymous with creativity, mysticism, and spirituality:
- “A purple world is one where art, poetry, and love collide.” – Edgar Allan Poe
- “Dive into the purple depths of your mind; that’s where genius lies.” – Leonardo da Vinci
- “Purple is the color of spirituality, connecting the earthly with the ethereal.” – Carl Jung
- “Nature always wears a hint of purple when it wants to speak to your soul.” – Ralph Waldo Emerson
- Purple flowers are nature’s whispers to dream.” – Georgia O’Keeffe
After reading this praise of purple, I think my mom was onto something. She embraced Spanish painter Pablo Picasso’s declaration that “[t]he world needs more purple – more creativity, passion, and a sense of wonder.”
There’s a special power inherent in purple, too. Fashion designer Coco Channel argued, “Purple is not just a color; it’s an attitude, a declaration of uniqueness.” Among utilitarian browns and grays and sweet pastels, purple “commands the room without saying a word” (Edith Wharton). Anne Morrow LIndbergh confessed that although she wanted to be “pure in heart,” she liked to wear her “purple dress.” Unabashedly, uniquely itself, purple announces, “Here I am.”
I think I’m genetically predisposed to color. As a child, I remember my granddad looking up into the summer sky and exclaiming, “Sky-blue-pink!” His brain was gloriously bending the color spectrum and filling the gaps to create new colors. I was the lucky recipient of some seriously good color genes. Since I received my first box of Crayola crayons, I’ve lived and breathed color. I loved the individual crayon names. I especially loved the big boxes with complete rows of various shades of primary and secondary colors. For years, I treasured my favorite colors, using my periwinkle and robin’s egg blue sparingly to prolong their lives. Even today, I find myself magnetically drawn to paint sections in home improvement stores and often stand transfixed before their neat rows of color samples. In another life, I might’ve been a paint mixer, reveling in the hallelujah moment when I opened a paint can to reveal the final color. Or maybe if our brains hadn’t made up purple, I might’ve been its creator, devoting my life to extolling its virtue and nominating my mom as its chief ambassador!
So here’s to purple, a splendid pigment of our imagination. Here’s to the incredible brain and its ability to “respond when faced with something out of the norm.” And lest you fail to take purple seriously, think twice. In Alice Walker’s 1983 Pulitzer Prize winning novel, The Color Purple, she cautions: “I think it pisses God off if you walk by the color purple in a field somewhere and don’t notice it.”
,