50 free Purple trivia questions with answers — trivia quiz, new questions added Aug 2026.
49 free Purple trivia questions with answers. Purple is the colour of emperors, mourning bishops, Prince and a certain dinosaur, and this quiz covers all of it. Forty-five questions run from the sea snails of ancient Tyre and the Byzantine 'born in the purple' to William Perkin's accidental invention of mauve, the Purple Heart, Purple Rain, the Purple People Eaters, amethysts, purple carrots, purple prose and the Purple Forbidden City. It is built for colour-themed trivia nights, classroom warm-ups and anyone who likes a quiz where the questions wander through history, science, music and pop culture. Easy questions ask which two colours mix to make purple; hard ones want the chemical in Tyrian dye and the year the Catholic Church's banned-books list ended. Every answer was checked against Wikipedia's articles on the colour, its dyes and the things named after it, and each question carries the sentence that supports it.
30 of 50 questions with answers and explanations. Play the quiz
Q 01In the RGB colour model, purple is made by mixing which two colours of light?
Red and blue
Unlike violet, purple has no single wavelength of its own, which is why it is called a non-spectral colour.
Q 02Which colour sits at the short-wavelength end of the visible spectrum, just before ultraviolet?
Violet
Purple, by contrast, is a mixture and never appears in a rainbow.
Q 03Who divided the visible spectrum into seven named colours in 1704?
Isaac Newton
He is said to have picked seven to match the notes of the musical scale.
Q 04Tyrian purple, the dye of emperors, was extracted from what?
Sea snails
Predatory rock snails of the Muricidae family secrete it; the smell of the dye works was notorious.
Q 05Tyrian purple takes its name from a city in which ancient civilisation?
Phoenicia
It has even been suggested that the name Phoenicia itself means land of purple.
Q 06Roughly how many murex molluscs were needed to yield 1.4 grams of pure Tyrian dye?
12,000
That was enough to colour only the trim of one garment.
Q 07Unusually for an ancient dye, what happened to Tyrian purple when exposed to sunlight and weather?
It became brighter
That colour-fastness was a big part of why it was so prized.
Q 08By the fourth century AD, who was the only person in Rome permitted to wear Tyrian purple?
The emperor
Sumptuary laws had tightened steadily; breaking them was treason.
Q 09What is the coloured compound in Tyrian purple?
6,6'-dibromoindigo
It is a close chemical cousin of indigo, with two bromine atoms attached.
Q 10Production of Tyrian purple as a fabric dye ended in which year, with the fall of a city?
1453
The Ottoman capture of Constantinople ended the Byzantine industry, and scarlet became Europe's royal colour instead.
Q 11The Byzantine title porphyrogennetos, 'purple-born', went to a ruler's child who was born when?
After the father took the throne
Empresses gave birth in a chamber of the Great Palace lined with purple porphyry stone.
Q 12Roman senators and senior magistrates were entitled to wear what purple detail on their togas?
A stripe
Under the empire, wearing full purple without permission could be punished as treason.
Q 13Which Frankish ruler was crowned in 800 wearing Tyrian purple and buried in a shroud of the same colour?
Charlemagne
He died in 814 at Aachen.
Q 21For what is the Purple Heart awarded?
Being wounded or killed in service
About 1.5 million were manufactured in World War II, many in anticipation of an invasion of Japan that never came.
Q 22Purple, green and white were the colours of which early-20th-century movement?
Women's suffrage
Purple stood for dignity, white for purity and green for hope.
Q 23In Nazi concentration camps, prisoners made to wear a purple triangle belonged to which group?
Jehovah's Witnesses
Other groups were marked with red, black, pink and other coloured triangles.
Q 14In 1464 Pope Paul II decreed cardinals should swap Tyrian purple for which colour?
Scarlet
The dye's supply had collapsed after Constantinople fell, and scarlet from kermes insects took its place.
Q 15Which culture developed the first synthetic purple pigment, around 700 BC?
China
Han purple, a barium copper silicate, was used on the Terracotta Army.
Q 16What was 18-year-old William Perkin trying to make in 1856 when he accidentally created the dye mauveine?
Quinine
His professor had challenged him to synthesise the malaria drug; instead he founded the synthetic dye industry.
Q 17The name mauve comes from the French word for which flower?
Mallow
The dye was originally sold as aniline purple before the name was adopted in 1859.
Q 18Which monarch made mauve fashionable with a mauveine-dyed silk gown at the 1862 Royal Exhibition?
Queen Victoria
The colour became so common that Punch magazine joked about an outbreak of mauve measles.
Q 19Who established the Badge of Military Merit, forerunner of the Purple Heart, in 1782?
George Washington
He ordered it from his headquarters at Newburgh, New York; the award lapsed after the Revolution.
Q 20The Purple Heart was revived in 1932 to mark what?
Washington's 200th birthday
It is now the oldest US military award still given.
Q 24Prince's Purple Rain spent how many consecutive weeks at number one on the Billboard 200?
24
It also won an Oscar for Best Original Song Score and has sold more than 25 million copies.
Q 25Which Purple Rain track's lyrics helped prompt Tipper Gore to campaign for Parental Advisory stickers?
Darling Nikki
The PMRC's 'Filthy Fifteen' list put it at number one.
Q 26Which Prince single from Purple Rain was his first Billboard Hot 100 number one?
When Doves Cry
It stayed on top for five weeks in the summer of 1984.
Q 27Jimi Hendrix said the title of Purple Haze came from what?
A dream of walking under the sea
The 1967 single reached number three in the UK; in concert he sometimes joked about kissing 'this guy'.
Q 28What was sprayed on anti-apartheid protesters in Cape Town on 2 September 1989?
Purple dye from a water cannon
A protester turned the cannon on National Party headquarters, and graffiti soon declared 'The purple shall govern'.
Q 29Amethyst is a purple-hued variety of which mineral?
Quartz
Iron impurities and natural irradiation give it the colour.
Q 30The name amethyst comes from Greek words meaning what?
Not intoxicated
The ancients believed the stone protected its wearer from drunkenness, and drank from amethyst cups.