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International orange is a color used in the aerospace industry to set objects apart from their surroundings, similar to safety orange, but deeper and with a more reddish tone.

Variations

There are several variants of international orange.

International Orange
(Engineering)
#BA160C

International Orange
(Golden Gate Bridge)
#F04A00

International Orange
(Aerospace)
#FF4F00

Aerospace

International Orange (Aerospace)
Color coordinates
Hex triplet	#FF4F00
sRGB (r, g, b)	(255, 79, 0)
HSV (h, s, v)	(19°, 100%, 100%)
CIELChuv (L, C, h)	(59, 152, 18°)
Source	htmlcsscolor.com
ISCC–NBS descriptor	Vivid reddish orange
B: Normalized to (byte)

The Advanced Crew Escape Suits pressure suits worn by NASA astronauts and the previous Launch Entry Suit use this color, as opposed to the lighter tone of safety orange used by the United States Air Force's high-altitude suits. This was also planned for the Constellation Space Suit systems that were to be flight-ready by 2015.

The Bell X-1, the first airplane to break the sound barrier, was also painted in International Orange.

Golden Gate Bridge

International Orange (Golden Gate Bridge)
Color coordinates
Hex triplet	#F04A00
sRGB (r, g, b)	(240, 74, 0)
HSV (h, s, v)	(18°, 100%, 94%)
CIELChuv (L, C, h)	(56, 143, 18°)
Source	spycolor.com
ISCC–NBS descriptor	Vivid reddish orange
B: Normalized to (byte)

The tone of international orange used to paint the Golden Gate Bridge in San Francisco, California is slightly lighter than the standard International orange used by military contractors and in engineering, thus increasing its visibility to ships, but darker than the one used in aerospace. The international orange paint used on the Golden Gate Bridge is specially formulated to protect the bridge from the danger of rust from salt spray off the ocean, and from the moisture of the San Francisco fog that frequently rolls in from the Pacific Ocean through the Golden Gate to San Francisco Bay. The 25 de Abril Bridge in Lisbon, Portugal also uses this color.

• The Golden Gate Bridge
• The 25 de Abril Bridge

Engineering

International Orange (Engineering)
Color coordinates
Hex triplet	#BA160C
sRGB (r, g, b)	(186, 22, 12)
HSV (h, s, v)	(3°, 94%, 73%)
CIELChuv (L, C, h)	(40, 124, 13°)
Source	FedStd 595
ISCC–NBS descriptor	Vivid red
B: Normalized to (byte)

The adjacent box displays the generic tone of international orange used by military contractors and in engineering generally.

The source of this color is Federal Standard 595, a U.S. federal government standard set up in 1956 for paint colors which is mostly used by military contractors and also in engineering. International Orange is designated as Federal Standard 595 color #FS 12197.

In accordance with air safety regulations, some tall towers, e.g. Tokyo Tower and the Yerevan TV Tower, are painted in white and international orange.

• Tokyo Tower in Tokyo, Japan
• Antenna atop the Main Tower in Frankfurt, Germany

Sports

The World Football League used international orange (instead of the traditional white) for the stripes on their footballs. The league also painted a short international orange mark on the field at the two-yard line.

Trucking

Schneider National paints its trucks, tractors, and trailers "international safety orange" (Omaha orange, PMS 165).

See also

• Fire engine red
• List of colors
• Safety orange
• School bus yellow

References

1. "HEX color #FF4F00, Color name: International Orange, RGB(255,79,0), Windows: 20479. - HTML CSS Color". www.htmlcsscolor.com.
2. "Why Are Astronauts' Spacesuits Orange?". Archived from the original on 2011-12-10. Retrieved 2010-07-18.
3. "NASA - The Spacesuit". Archived from the original on 2010-05-20.
4. "#f04a00 hex color information". www.spycolor.com.
5. "Frequently Asked Questions about the Golden Gate Bridge". Golden Gate Bridge. Archived from the original on 2015-08-10. Retrieved 2020-06-12.
6. "FED-STD-595 and AMS-STD-595 Fan Decks and Color Chips". fed-std-595.com.
7. "Tokyo Tower Data". Nippon Television City Corporation. Archived from the original on 2008-04-30. Retrieved 2012-05-26.

External links

• A 12-page 1988 GSA-approved specifications for International Orange paint, including other "formulas" (Archived on June 21, 2010, via the Internet Archive.)

• Shades of orange
• Shades of red
• Safety
• Safety clothing