School bus yellow
A yellow made for North American school buses to stand out and be seen
School bus yellow is a vivid yellow colour created in 1939 for North American school buses. Its original pigment was lead chromate, chosen for visibility and steel protection, but later replaced by safer and less toxic alternatives. The colour is now a standard for school buses in the United States and Canada.
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- Created in 1939 for school bus safety in North America
- First made with toxic lead chromate pigment
- Now uses safer azo-based organic pigments
- Chosen for high visibility and legible black lettering
- Adopted as a standard in the US and Canada
What colour is School bus yellow?
School bus yellow is a strong, vivid yellow shade made to be highly visible in daylight and semi-darkness. It is brighter and more orange-toned than many other yellows, making it stand out from its surroundings. This colour is most often seen on school buses in North America, where it is used for safety and recognition.
Where does School bus yellow come from?
The colour was created in 1939 at a conference led by Frank W. Cyr in New York, where officials and paint experts set national standards for school buses. The yellow-orange shade was chosen because black letters are easy to read on it, and because it is eye-catching and unusual. The colour became a standard in the United States and Canada, and is linked to the image of school buses.
How is School bus yellow made?
The first school bus yellow paint used lead chromate, known as chrome yellow, which protected steel but was toxic. To reduce risks, it was replaced with cadmium-based pigments, which are also hazardous and costly. Today, safer azo-based organic pigments are used to achieve the same bright colour, avoiding heavy metals.
Where School bus yellow is used
School bus yellow is mainly used for the bodies of school buses in the United States and Canada, and has been adopted in some parts of the United Kingdom. The colour helps buses stand out in traffic and makes black lettering easy to see from a distance. It is a standard for school bus livery and safety.
Yellow around the world
What the yellow family means from country to country.
Many First Nations use the medicine wheel, a circle in four parts. A common form has yellow, red, black and white quarters for the four directions, though the colours vary between nations.
Sacred and holySource: Medicine wheel (symbol)A yellow ribbon tied round a tree or pinned to a coat means someone is waiting for a loved one to come home. It spread during the Iran hostage crisis of 1979 to 1981.
Protection and healingLove and desireHopeSource: Yellow ribbonSchool buses across the country are painted one shade of yellow, agreed at a conference in 1939 because black lettering on it is easy to read in early morning light.
Protection and healingSource: School bus yellowThe yellow disc of the Aboriginal flag is the sun, giver of life. The flag was designed by the Luritja artist Harold Thomas and first flown in Adelaide in 1971.
Sacred and holySource: Australian Aboriginal flagAt the gaye holud, held a day or two before a wedding, relatives rub turmeric paste on the bride and groom. Guests dress in yellow and orange.
Weddings and marriageFestival and celebrationJoySource: Gaye holudOn Pohela Falgun, the first day of spring, young women wear yellow and orange saris, a shade called basanti, with flowers in their hair.
Festival and celebrationNature and renewalJoySource: Pohela FalgunShades and relatives of School bus yellow
There are three slight variants of school bus yellow to suit different paint types, but all are close in appearance. It is sometimes confused with other strong yellows like chrome yellow or cadmium yellow, but is set apart by its official use and specific shade.
Colours that go with School bus yellow
Harmonies are worked out from the value #FFD800. Contrast ratios follow the WCAG 2 formula.
Questions people ask about School bus yellow
What colour is school bus yellow?
School bus yellow is a vivid, slightly orange-toned yellow made to be highly visible, especially on school buses in North America.
Why was this colour chosen for school buses?
It was picked in 1939 because black letters show up clearly on it in low light, and because it is bright and easy to spot from a distance.
Where does the name come from?
The name comes from its use on school buses, and it was first called National School Bus Chrome before becoming National School Bus Glossy Yellow.
What was the original pigment used?
The first pigment was lead chromate, also known as chrome yellow, but it was replaced due to toxicity.
Is school bus yellow used outside North America?
It has been introduced in some parts of the United Kingdom, but is mainly used in the United States and Canada.
Good reading and sources
The facts on this page come from the Wikipedia article "School bus yellow", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Rang rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes. The swatch is an approximation: named colours are not fixed standards, and every screen shows them a little differently. If something is wrong, tell us. Last refreshed 2026-10-03.
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