fire extinguisher colours
Fire extinguisher colours are a code that tells you what type of fire each extinguisher is designed to tackle, and using the wrong one can make a fire much worse.
Quick Scoop
In modern UK and many Commonwealth standards, most portable extinguishers have a red body with a coloured band or label near the top.
That band colour shows the extinguishing medium inside and, by extension, which fire classes it is meant for.
Here’s the core idea:
- Red band → Water
- Cream band → Foam
- Blue band → Dry powder
- Black band → CO₂
- Yellow band → Wet chemical
Each of these is suited to different fire classes (A, B, C, D, F and electrical), and mis‑matching them (for example, using water on burning oil or live electrics) can spread flame or cause electric shock.
Main fire extinguisher colours and uses
| Band colour | Extinguisher type | Common use | Typical fire classes | Avoid using on |
|---|---|---|---|---|
| Red | Water (spray / jet / mist) | [7][3]Wood, paper, textiles, general combustibles | [5][1]Class A (solid combustibles) | [1][5]Flammable liquids, live electrics, cooking oil fires | [5][1]
| Cream | Foam | [3][7]Petrol, diesel, plus some solid combustibles | [1][5]Class A and Class B (liquids) | [5][1]Cooking oils, some electrical equipment unless specifically rated | [1][5]
| Blue | Dry powder (ABC or specialist) | [7][3]Flammable liquids, gases, many electrical fires | [9][1]Often A, B, C and electrical (for “ABC powder” types) | [9][1]Confined spaces (powder clouds reduce visibility and can affect breathing) | [9]
| Black | Carbon dioxide (CO₂) | [3][7]Live electrical equipment, small flammable liquid fires | [5][1]Electrical and small Class B fires | [1][5]Deep‑seated Class A fires; can allow re‑ignition once gas disperses | [5][1]
| Yellow | Wet chemical | [7][3]Commercial kitchens, deep‑fat fryers, cooking oils and fats | [1][5]Class F (cooking oils); often some Class A rating too | [5][1]Flammable liquids, gases, most electrical fires (unless rated) | [1][5]
A quick story to remember it
Imagine walking into a small restaurant kitchen late at night.
- Beside the fryer is a yellow‑band extinguisher: that’s the wet chemical, sitting like a guardian over the hot oil.
- In the dining area you notice a red‑band water unit for chairs, curtains, and wooden fittings.
- Near the POS computers and the fuse board is a black‑band CO₂ extinguisher, ready for any electrical fault.
The colours are basically a visual map of the risks in each area.
Mini sections
1. Why so many colours?
- They let someone under stress recognise “safe vs unsafe” options in seconds.
- Colour coding supports national standards (like BS EN3 in the UK) so workplaces remain consistent.
- They help safety inspectors, insurers and fire services quickly check if the right coverage is in place.
2. Are all-red extinguishers wrong?
No. Modern extinguishers often have an all‑red (or chrome) body with only a label/band in the secondary colour, rather than the whole cylinder being blue or cream.
Older designs used full‑body colours, but most standards moved to predominantly red for visibility and consistency in the late 1990s.
3. Common mistakes people make
- Grabbing a red water unit for a pan fire or fuel spill (very dangerous, as it can spread burning liquid).
- Assuming any extinguisher is fine for electrics; only specific foam/powder units and CO₂ are rated for live equipment.
- Using powder in small offices when CO₂ or other options might be safer and less damaging.
Forum-style tip
If you’re ever unsure which extinguisher to use in a real fire, your safest move is usually to evacuate first and call the fire service rather than experiment with the wrong colour.
Always read the label on the extinguisher itself (it will list fire classes
and exclusions), not just the colour, and follow local fire safety training.
TL;DR:
Red = water, cream = foam, blue = dry powder, black = CO₂, yellow = wet
chemical; the colour band tells you what kind of fires the extinguisher is
safe for, and using the wrong one can seriously increase the danger.
Information gathered from public forums or data available on the internet and portrayed here.