9 Colors Named After People

Alice Roosevelt—for whom Alice Blue is named—in 1902
Alice Roosevelt—for whom Alice Blue is named—in 1902
Frances Benjamin Johnston, Library of Congress/Wikimedia // Public Domain

Throughout history, a variety of famous people have lent their names to shades of brilliant blue, shocking purple, grassy green, muddy brown, and other hues. While many of these figures are artists who were known for using or developing these hues, other color eponyms come from the scientists who invented them or those who loved to wear them. Consider this list the place where the history books meet the artist’s palette.

1. Alice Blue

A pale azure blue named for Alice Roosevelt Longworth, daughter of Theodore Roosevelt, who was known for wearing gowns of the color and thus sparking a trend for it. (She was also known for smoking in public and other forms of mischief-making, leading her father to declare: “I can either run the country or I can attend to Alice, but I cannot possibly do both.”) Her ice-blue dresses inspired the song "Alice Blue Gown" by Joseph McCarthy and Harry Tierney, which premiered in the 1919 Broadway musical Irene. ("I once had a gown that was almost new / Oh, the daintiest thing, it was sweet Alice Blue / With little forget-me-nots placed here and there / When I had it on, I walked on air.")

2. Yves Klein Blue

Visitors look at 'Monochrome Blue, without title' (1960) by French artist Yves Klein
Visitors look at Monochrome Blue, without title (1960) by French artist Yves Klein
THOMAS LOHNES/AFP/Getty Images

The artist Yves Klein was interested in art as transcendence, and he’s perhaps best known for painting monochromes in a brilliant ultramarine meant to suggest the infinity of sea and sky. (As Klein once explained, "Blue has no dimensions, it is beyond dimensions.") In 1960, he registered a formula for the color—known as IKB, or International Klein Blue—with the French government; the formula relied on ultramarine pigment mixed with a synthetic resin that wouldn't dilute the color.

During his “blue period,” Klein exhibited only blue paintings and objects, releasing a thousand and one blue balloons into the sky in Paris to celebrate one show, and serving gin, Cointreau, and blue-dye cocktails at another. Don’t copy that last idea, mixologists: everyone who drank them peed blue for days.

3. Titian Red

Visitors look at a painting by Renaissance master Titian in Rome
Visitors look at a painting by Renaissance master Titian in Rome
GABRIEL BOUYS/AFP/Getty Images

A person with red hair is sometimes said to be a Titian, after the great 16th century Venetian painter who was notably fond of painting redheads. (Examples of such paintings include Bacchus and Ariadne and Noli me Tangere, now in London's National Gallery.) In the 1960s, redheaded Barbie dolls were officially known as “Titians.” More loosely, the term has come to mean any orange-red color, although people seem to love to debate exactly what shades count.

4. Scheele's Green

Svenska Familj-Journalen, Wikimedia Commons // Public Domain

Arsenic-based green pigments were all the rage in the 19th century, coloring everything from hosiery to hats to children’s toys. The first such pigment on the scene was Scheele’s Green, discovered by Swedish chemist Carl Wilhelm Scheele in 1775. The vibrant yellow-green hue caught on, especially after it was discovered that arsenic also produced a variety of other greens, from deep emerald to pale peridot. Although Scheele and others knew how toxic these pigments were, that didn't stop the colors from being used for clothing, candles, papers, playing cards, book-bindings, and sometimes even food. In perhaps the most famous example of its use, arsenic green wallpaper graced Napoleon’s last bathroom while he suffered through his exile on St. Helena, and some think the fumes caused by his long baths may have been what killed him.

5. Isabelline

José Reynaldo da Fonseca, Wikimedia Commons // CC BY 2.5

If true, this color's origin story has to be the most off-putting in history. Once used to describe the pale champagne color of certain horse coats and bird feathers, the term Isabella-colored or isabelline is said (by no less than Isaac D'Israeli's 1791 Curiosities of Literature) to come from Isabel of Austria, the devoted daughter of Philip II of Spain.

Supposedly, when Spain laid siege to the city of Ostend in 1601, Isabella vowed not to change her undergarments until the city was taken. She expected a speedy victory, but much to her dismay (and presumably that of everyone around her), the fighting continued for three years before Spain won.

The Oxford English Dictionary dismisses this origin story, noting that Isabella as a color is first noted in 1600, a year before the siege began. But linguist Michael Quinion notes that accounts in French, German, Spanish and Italian (where isabelline has a similar color meaning) refer to the earlier Queen Isabella of Castile (1451-1504) and the siege of Granada—which means the story might just be true, even if it's about a different Isabella and a different set of 7-month-old dirty underwear.

6. Fuchsia

Heinrich Füllmaurer, Wikimedia Commons // Public Domain

Here's a more pleasant etymology: The vivid red-purple of fuchsia, the color, comes from fuchsia, the flower, which is in turn named for 16th-century German botanist Leonhart Fuchs. (His last name, by the way, comes from the German word for "fox.") And if you think fuchsia and magenta are the same color, you're closer than you might think: Magenta was originally an aniline dye named fuchsine, named after the fuchsia flower. The name was changed in 1859, the year it was patented, in honor of the French victory at the Battle of Magenta. That apparently helped the dye become a stunning success.

7. Vandyke Brown

Anthony van Dyck, Wikimedia Commons // Public Domain

This deep, warm, transparent brown was made with a high concentration of organic matter (basically: actual dirt), and was popular with the Old Masters. It was named for the innovative Flemish painter Anthony van Dyck, who often used the color in his paintings, and who also lent his name to an early photographic printing process—which also produced a brown color, but did not actually involve dirt.

8. Perkin's Mauve

Wikimedia Commons // Public Domain

Like so many scientific discoveries, the invention of synthetic dyes happened by accident. In 1856, chemistry student William Henry Perkin, then only 18, was trying to find a new way to make quinine (a popular treatment for malaria, and the ingredient that still gives tonic water its slightly bitter taste). The experiment didn't quite work as planned, but Perkin noticed some purple sludge left over in his flask after rinsing it with alcohol, and realized its potential.

His instincts were good: After Perkin patented his creation and began mass-producing it, the color swept England, becoming so popular that the magazine Punch condemned an outbreak of “the mauve measles.” The color was originally called aniline purple by Perkin, as well as Perkin's purple or Perkin’s violet. The mauve part of “Perkin’s mauve” came a few years later thanks to the French, who named it after their word for the mallow flower.

9. Hooker's Green

Thomas Herbert Maguire, Wikimedia Commons // Public Domain

The warm, grassy "Hooker's Green" is named for botanical illustrator William Hooker (1779–1832), who created a special pigment just to convey the exact green of leaves.

Bonus: Mummy Brown

A close-up of an Egyptian mummy head
A close-up of an Egyptian mummy head
iStock.com/izanbar

OK, it’s not a color named after one person, but a color named after many people—many dead people. First made in the 16th and 17th centuries, but a special favorite of the 19th century painters, this rich brown pigment was created by mixing both human and feline mummy crumbles with white pitch and myrrh. (Although we tend to think of them as protected antiquities today, people in centuries past often considered mummies just another natural resource.)

In part because of its curious components, the pigment wasn’t the most stable in the world, and it fell out of favor once its origin story became better known. According to one biography, the Pre-Raphaelite artist Edward Burne-Jones gave his tube of Mummy Brown a funeral in his garden when he discovered where it came from. The pigment was sold into the 20th century, although if you see the name “mummy brown” used today, rest assured it contains no actual corpses. Probably.

A version of this list first ran in 2016.

What’s the Difference Between Forests, Woods, and Jungles?

Jui-Chi Chan/iStock via Getty Images
Jui-Chi Chan/iStock via Getty Images

If you're an English speaker, there’s a good chance you often use the words woods, forest, and jungle correctly without even thinking about it. Even if a patch of trees takes up a significant portion of your backyard, you probably wouldn’t consider it a forest; and you wouldn’t talk about the beautiful fall foliage in New England’s jungles. Based on those examples, it seems like woods are smaller than forests, and jungles aren’t found in colder climates. This isn’t wrong—but there's more to it than that.

According to Merriam-Webster, a forest is “a dense growth of trees and underbrush covering a large tract,” while woods are “a dense growth of trees usually greater in extent than a grove and smaller than a forest.” The reason we consider forests to be larger than woods dates back to the Norman rule of Great Britain in 1066, when a forest was a plot of land owned by the Crown that was large enough to accommodate game for royal hunting parties. Whether that land contained trees or not was essentially irrelevant.

These days, scientists and land managers definitely consider the presence of trees necessary for land to be classified as a forest. To set it apart from woods, or woodland, it usually has to meet certain density qualifications, which are different depending on whom you ask.

According to the UN Food and Agricultural Organization (FAO), a forest must cover about 1.24 acres of land, and its canopy cover—the amount of land covered by the treetops—must exceed 10 percent of the acreage [PDF]. “Other wooded land” must also span about 1.24 acres, but its canopy cover is between 5 and 10 percent. In a nutshell, the FAO thinks forests and woods are the same size, but forests are more dense than woods. Australia, on the other hand, employs plant ecologist Raymond Specht’s classification system for its vegetation, in which any tree-populated land with less than 30 percent canopy cover is a woodland, and anything more dense than that is a forest.

Unlike forests, jungles don’t have specific scientific classifications, because the word jungle isn’t really used by scientists. According to Sciencing, it’s a colloquial term that usually denotes what scientists refer to as tropical forests.

Tropical forests are located around the Equator and have the highest species diversity per area in the world. Since they’re so densely populated with flora and fauna, it makes sense that both Merriam-Webster and the Encyclopedia Britannica describe jungles as “tangled” and “impenetrable.” They’re bursting with millions of plants and animals that are different from what we see in temperate and boreal forests to the north.

Because most of us aren’t in the habit of clarifying which type of forest we’re talking about in casual conversation, it’s no surprise that we often refer to the temperate forests we see in our own climate simply as forests, which we differentiate from those rich, overgrown tropical territories to the south by calling them jungles.

To summarize, forests are historically and colloquially considered to be larger than woods, and scientifically considered to be more dense. Jungles are technically forests, too, since jungle is a casual word for what scientists call a tropical forest.

And, all differences aside, it’s relaxing to spend time in any of them—here are 11 scientific reasons why that’s true.

Have you got a Big Question you'd like us to answer? If so, let us know by emailing us at bigquestions@mentalfloss.com.

5 Benefits of Sarcasm, According to Science

AntonioGuillem/iStock via Getty Images
AntonioGuillem/iStock via Getty Images

Writing of her future demise, author and humorist Dorothy Parker once observed that her epitaph might read, “Wherever she went, including here, it was against her better judgment.”

Celebrated for her scathing wit and wordplay, the late Parker might agree that sarcasm held tangible benefits. Doled out with care, ironic remarks—usually defined as communication that humorously conveys your intent through language that appears to be the opposite of what you mean—can amuse friends, lighten the mood, or broadcast your wit. But there’s more to sarcasm than simply eliciting a laugh. It turns out that the perks of your caustic muttering might have some scientific support. Take a look at a few peer-reviewed consequences to your snappy comebacks.

1. Sarcasm and humor might make you appear more confident, particularly at work.

In a 2016 paper published in the Journal of Personality and Social Psychology, researchers evaluated adults on their responses to some candid remarks about fictional pet food and travel companies, among other subjects. Those with zingers were perceived as having more competence and confidence. “The successful use of humor—telling jokes that are funny and appropriate—can raise your status because it makes you appear more confident and more competent,” says co-author Thomas Bitterly, a postdoctoral research fellow at the University of Michigan's Stephen M. Ross School of Business. “Confidence and competence are two of the key traits that determine whether we give someone status. The reason for this is because we want the individuals who have influence in a group to be those who are capable of leading it.”

Humor and sarcasm work to reinforce these traits, Bitterly tells Mental Floss, because humor itself is a risk. “Before we tell a joke, especially to people we do not know well, it’s difficult to know with certainty if our audience will find it funny and appropriate. If they find it unfunny and inappropriate, they will think that we lack competence and we will lose status. Given that humor is risky, telling a joke signals confidence,” he says.

2. Sarcasm can improve creativity.

In a 2015 paper [PDF] published in Organizational Behavior and Human Decision Processes, researchers (including those at Harvard and Columbia business schools) made the case for sarcasm facilitating creative thinking. In a series of experiments, participants gave or received positive, neutral, or sarcastic responses with a partner. Those in the sarcastic groups performed better at creative tasks—like problem-solving on paper—after the fact.

"This is because both sarcasm construction and sarcasm interpretation are conducive to abstract thinking, a key cognitive precursor to creative thinking," lead author Li Huang, an assistant professor of organizational behavior at INSEAD, tells Mental Floss. Huang points to a common sarcastic comment aimed at someone wasting time in the workplace: "Don't work too hard." The intended meaning is likely to "work harder." Both the speaker and recipient benefit, Huang says, because both need to process the underlying message. The speaker must translate the admonishment to sarcasm, and the recipient has to consider what the speaker really meant. That abstraction fosters creative thinking because creativity is needed to discern the truth and not the literal meaning of the statement.

"In this way, to construct or interpret sarcasm is to traverse the psychological distance between the stated and the intended meaning through abstract thinking," Huang says.

There is one word of caution: Sarcasm tends to have this effect when it’s lobbed between two parties who know and trust one another. With strangers, it might simply come off as rude or confusing.

3. Sarcasm can make criticism seem almost pleasant.

Want to offer some constructive commentary without feeling like a jerk? In a 2016 paper published in the Journal of Speech, Language, and Hearing Research, co-author Melanie Glenwright, an associate professor of psychology at the University of Manitoba, examined how adults and children interpreted sarcastic commentary. The generally agreeable reactions by adults to criticism indicates it can be wrapped in an amusing remark that reduces the chance for the listener to feel offended.

“The use of indirect language allows the speaker to criticize the addressee indirectly which is perceived as more polite than a direct, literal insult,” Glenwright tells Mental Floss. "Speakers may use sarcasm to deliver insults in professional or social settings where they want to criticize another person in a less-harsh manner.”

4. Sarcasm can make for better social bonding.

When we pass along a humorous observation and someone agrees with it, we’re strengthening our bond with that individual, according to Glenwright. “[Sarcasm] improves social bonding between the speaker and the addressee,” she says. “Sarcasm can also be used to convey humor and jocularity which can improve mood both in the speaker and addressee.”

5. Sarcasm might make you appear more intelligent.

Sarcasm and humor alike share a common trait: They require creative thinking that’s rapidly deployed to analyze a situation. Depending on the company, Bitterly says that a clever retort could potentially have people thinking more highly of you. “Saying something that is funny and appropriate is difficult,” he says. “It requires being able to recognize an opportunity for humor—'did someone just say something I know a funny response for'—[and] being able to quickly generate or recall a funny response and being able to predict how the audience is going to respond. On top of those things, delivery and timing also matter …. We tend to view people who manage to successfully pull off all of these things as being more intelligent, and we see that reflected in the way we refer to them.”

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