Generally you observe safety signs in several areas such as workplace, construction sites, factories, warehouse and roads. But they have many colors like red, green, blue and yellow etc. In this article, we explained all safety signs colours and meanings. You will also learn their purpose in workplaces.
Safety Sign Color Codes According To OSHA & ANSI
Safety sign colors are used to tell you a message quickly. They provide you guidelines that you can follow for your safety. The Occupational Safety and Health Administration (OSHA) is a federal government agency in the USA that sets workplace safety and health standards for the protection of laborers.
ANSI (American National Standards Institute) is a private and nonprofit organization. Its ANSI Z535 series provides guidelines for safety signs, symbols, colors and other visual safety communication.
| Colour | Sign Type | Mean | Examples |
| Red | Prohibition | Indicate danger and forbid certain actions | Stop signs, fire extinguishers |
| Yellow | Caution | Warn about unsafe conditions | Wet floor and high voltage |
| Blue | Mantadory | Provide instructions and directions | Wear a helmet, hospital |
| Green | Safe condition | Emergency exits, rescue facilities | Directional freeway signs, first aid kits |
| Orange | Warning | Temporary hazards, work zone warnings | Construction signs, machine guards |
| Purple | Radiation hazard | Indicate area where radioactive material is present | X-ray room warning signs |
| White | General information | Traffic directions and housekeeping | Floor markings, directional signs |
1. Red Safety Signs
The red safety sign indicates danger and prohibition. If you see it, you need to be alert about any dangerous situation. It is also used to mark the fire equipment. Due to its bright color and simple symbol, you understand it easily and take action immediately. Plus, its visibility is not affected by weather. You can notice it in smoke and rain easily.
Examples:
- No smoking
- Stop signs
- Fire extinguisher
- No entry
- Do not touch
Where you will see:
- Prohibited areas
- Hazardous places
- Fire hose station
- No open flame areas
- Restricted access region
2. Yellow Safety Sign
If you go to a worksite by chance and find a yellow safety sign there then you have to take it as a caution sign. It warns you about physical and health hazards that can be harmful for you. So, you must take care of your safety at these places after seeing it. These signs are mostly found in yellow background and black border with specific text.
Example:
- Slippery surface
- Biological hazards
- Electrical risks
- Moving machinery
- Warning deep water
- Dangerous chemicals
Locations:
- Access points
- Walkways and floors
- Electrical panels
- Forklift traffic
- Physical obstacles
3. Blue Safety Sign
Blue safety sign gives you specific rules which you must follow. So, you can also take it as a mandatory sign. But its guidelines are for your safety and to protect you from danger in the worksites. You can place it in open areas or where light is available. This thing helps workers to identify it without any difficulty.
For instance:
- Wear eye protection
- Fire door keep clear
- Put on reflective vest
- Wear a hard hat
- Use handrail
- Wear face shield
Location:
- Zone entrances
- Machine fronts
- Hygiene stations
- Equipment surfaces
- Before the hazard
4. Green Safety Signs
Green safety signs signify safe conditions where danger runs out. It uses green base and white text to point workers to the safe place quickly. Like other signs, it does not give you a warning and prohibition. In fact, it provides you a safe zone. Its design and color follow the ISO 7010 standard that make it understandable to all laborers.
Examples:
- Emergency exits
- Assembly points
- First aid stations
- Safety shower
- Fire exit
- Refuge point
Where you will find:
- Escape pathway
- Safe condition areas
- Exercise equipment location
- Emergency gathering point
- Emergency eyewash station
5. Orange Safety Signs
Orange is a warm colour used to warn you about serious hazards. At worksites, it marks dangerous parts of machines such as sharp edges, moving tools and electrical equipment. So, you should pay proper attention. If you do not take care of it, they can cause severe injury. Due to your little mistake, other workers’ lives may be at risk also.
Example:
- Temporary construction
- Do not cross
- Watch your step
- Machinery hazard
- Flammable material sign
Locations:
- Workplace machinery
- Biohazard storage
- Construction zones
- Medical lab
- Temporary work areas
6. Purple Safety Sign
Purple safety signs indicate radiation hazards and presence of radioactive materials in the workplace. They are used under the standard of OSHA and ANSI. These signage warn workers from rooms and stores where chemicals are present. You can take it as a three blade radiation warning sign that looks like a trefoil.
For instance:
- Radioactive materials
- Radiation area
- Airborne radioactivity
- Laser radiation warning
Location:
- Industrial facilities
- Nuclear power plants
- Laboratory entrances
- Storage rooms
7. White Safety Signage
At worksites, white signs are used to give general information to the workers. They provide guidance and directions, while other signs tell you to take immediate action. You will find it mostly white background with black text. But it is also used as a base for other signs. The combination of white with different colors makes it easily understandable.
Examples:
- Directional signs
- No entry
- Danger sign
- No smoking sign
Where you will see:
- Sanitation station
- Facility entrance
- General corridor
- Equipment control points
Importance of Safety Signs
Safety signs are visual tools used to warn you about hidden danger. They are helpful in guiding people during crises. As a result, they protect you from accidents. Workplace safety signs provide safety guidelines to workers, such as when to wear gloves, hats and eye protection. This thing makes sure their safety during work.
Installing safety signs in the proper way can reduce injuries by 20%. The floor signs in busy work zones also cut slip and fall incidents up to 25%. As a result, workers can stay alert from hazards and take action on the spot.
See Also: OSHA Wet Floor Sign Regulations: 2027 Safety Guide
Duties of Employer Related To Workplace Safety Signs
As an employer, you need to provide a safe environment to your workers. If there is a major workplace risk which is not controlled by other methods, you can use safety signs. But for this process, you have to take care of the following things.
- First of all, take a round of your worksite and find where there is a need to install safety signs.
- You have to use proper signs according to the place. For instance, apply warning signs near dangerous zones.
- You can also install directional signs inside workplace areas. It is helpful for vehicles and workers to find their way.
- Also make sure the signs are clear that their text and picture are bright and readable. They are not blocked by anything.
- You must have to choose those signs which are designed according to the international standards.
- If they are dull or broken then replace them with new ones. So that people do not misunderstand it.
- In the case of installing a new sign, you can explain its meaning to the staff, especially to the new workers.
- You can remove those safety signs that are outdated and not needed now. It protects laborers from confusion.
- Also remind your staff that these signs only alert you from danger. So, do not replace it with safety equipment.
- For impaired workers, you can use visual or hearing devices. It will guide them in an emergency situation.
- You need to avoid irrelevant signs, which can cause laborers to ignore safety messages.
Final Words
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Frequently Asked Questions
Why are texts included in some safety signs?
The text adds to safety signs to clarify the complexity of signs. In fact, they are also used to display the legal signal words like danger and caution. You can understand them quickly by their colors. But to get details, you need text.
What are safety signs in the workplace?
Safety signs are standardized visual symbols used to warn workers to hazards. They have specific color systems that distinguish them. As a result, all laborers and visitors remain alert and prevent accidents.
Which safety sign is a warning sign?
If you find a yellow triangular sign with a black border and black symbol in its middle, take it as a warning sign. These signs tell you about the hidden danger. That’s why you need to be more careful.
Are safety signs required by law?
Yes, safety signs are required in many workplaces and public buildings by law. They are helpful in providing safety information at those places. The main purpose of their use is to protect workers and people from hazards.
