Colour-coded chopping boards for UK kitchens

What the colours are for

Harmful cross-contamination is most likely when raw food touches or drips onto ready-to-eat food, or onto the equipment that then touches ready-to-eat food. The Food Standards Agency uses a plain example: cut raw chicken on a board, and the bacteria are on the board and the knife. Cut cucumber on that board without a proper clean and disinfection, and the bacteria move to the cucumber. Ready-to-eat food has no later cooking step to rescue it. Salad, cooked meat, bread, cake, washed fruit and garnishes all sit in that group.

The legal duty is to keep raw and ready-to-eat work adequately separated, and to keep surfaces and equipment clean and, where necessary, disinfected. That comes from assimilated Regulation (EC) No 852/2004 and from the way the Agency expects businesses to control E. coli O157, which also helps control salmonella and campylobacter. The Agency's catering guidance says to use different equipment, including chopping boards and knives, for raw meat or poultry and for ready-to-eat food, unless the equipment can be heat-disinfected in a commercial dishwasher. Safer Food, Better Business tells caterers to use separate boards and utensils for raw and ready-to-eat food, and colour coding is the method the pack and most training use so a new cook can see the difference at a glance.

There is no single statutory list of colours in UK food law. A red board is not legal because it is red. It is useful because your safe method says red means raw meat, and the people on shift follow that sentence. Food Standards Agency research with kitchens has found the same pattern many suppliers sell: red commonly used for raw meat and poultry, blue for raw fish, and other colours for other foods. You may use a shorter code, for example one colour for all raw meat and fish and another for everything ready to eat, if the kitchen is simple and the rule is written down. What fails an inspection is a poster that says six colours and a practice that says whichever board is nearest.

Boards are only one link. Hands move bacteria just as efficiently. The handwashing and gloves guide is the other half of the same moment: you wash, or you change gloves, when you leave the raw board. Cloths, containers and the fridge shelf matter too. A perfect set of boards under a raw chicken that is dripping onto a cheesecake is not a controlled kitchen. The SFBB guide shows where the cross-contamination safe methods sit in the pack.

A colour code you can write into the pack

Pick a code, buy boards that match it, put it in the safe method, and stick the same words where the boards are stored. The set below is the one many UK cafés, schools and takeaways already train. Use it if it fits. Change it if your menu is different. Do not train two codes because one member of staff learned a different order at college.

• Red: raw meat and raw poultry. Chicken, beef, lamb, pork, bacon, mince, and the packaging those arrive in if it touches the board. This is the board you treat as contaminated the moment it is used.
• Blue: raw fish and raw shellfish. Even if you rarely serve fish, a blue board stops a Saturday fillet from landing on the meat board or the salad board. If you never prepare raw fish, say so, and do not leave a mystery blue board that someone will invent a use for.
• Yellow: cooked meat. Ham, cooked chicken, sliced beef for sandwiches, and other ready-to-eat meats. Cooked meat is ready to eat. It does not go back on the red board because it is "still meat".
• Green: salad, fruit and other ready-to-eat produce. Washed leaves, tomato, cucumber, lemon for a drink, fruit for a dessert. If it will be eaten without further cooking, it does not share a board with raw meat.
• White: bakery and dairy. Bread, sandwiches, cheese, butter, pastry that will not be cooked again. Some kitchens use white for all ready-to-eat foods and drop yellow. That is fine if the method says so and raw stays on red and blue.
• Brown: raw vegetables that will be cooked. Soil-covered potatoes, unwashed carrots, and other vegetables with dirt on them that are heading for the oven or the pot. Soil is a source of bacteria. It does not belong on the green board just because it is a vegetable.
• Purple, where you use it: a separate allergen job. Often kept for a defined free-from preparation. Purple is not a magic claim. See the allergen section below before you rely on it.

Write the exceptions in the same paragraph. A raw burger is red. A cooked burger is yellow. Raw chicken marinade is red, including the spoon. A jacket potato that has been baked and is now being split for service is ready to eat: it does not go back on the brown board that still has soil on it. Eggs are a raw hazard. Crack them on a raw board or in a jug you then wash, not on the edge of the white bread board. Pickles and other ready-to-eat jars stay with ready-to-eat utensils even when they are served beside raw food at a counter.

If the menu is tiny, a two-board rule can be clearer than seven colours nobody remembers. Example: red for all raw meat, poultry and fish; white for all ready-to-eat food; brown only if you prepare dirty vegetables. The test is whether a new starter can repeat the rule without looking at a laminated sheet they have never used. Extra colours you do not enforce are worse than a short list you do.

Knives, cloths, trays and where boards live

A colour-coded board with a shared knife is not a system. Give raw meat its own knives, and keep them on the red side of the bench. Handles can be coloured, or the knives can live in a labelled slot so the bread knife never rests on the chicken board. Tongs, scrapers, probes and temperature probes follow the same split. A probe that has just been in raw mince is not pushed into a cooked pie. Wash and disinfect it, or keep a probe routine that your probe guide already expects you to wipe and sanitise between foods.

Containers need the same thinking. A red tray for raw chicken in the fridge, stored below ready-to-eat food, stops a drip onto cake. The Food Standards Agency's cross-contamination advice is that raw food is kept separate, covered, and not stored above ready-to-eat food. The board is only the preparation step. The shelf is the storage step. Do not put a raw board, wet with chicken juice, on a rack above the green boards so it drips overnight.

Store boards so they can dry, usually standing in a rack, raw separated from ready-to-eat. Stacking wet boards spreads whatever was on the top one. Do not leave them soaking in a sink of grey water "until someone has time". That water becomes a shared bath for every board you drop in later. Cloths are a frequent leak in an otherwise tidy colour code. Use disposable cloths or paper for raw areas, or a cloth that is washed in a hot cycle and is never used on a ready-to-eat board. The cleaning schedule should say which cloths exist and how they are laundered. One cloth on a string between the raw board and the sandwich board undoes the colours every time it is used.

Worktops follow the boards. If you can, prepare raw meat in one area and ready-to-eat food in another. Where the kitchen is a single bench, separate the work by time: raw first, then a full clean and disinfection of the surface, then ready-to-eat, with no raw food still sitting out. The Agency describes separation by area as the stronger control, and separation only by cleaning as the option with the most risk. If you rely on time separation, supervise it. A busy lunch will collapse it unless someone is allowed to stop the line.

Cleaning, disinfection and the dishwasher

Colour coding reduces how often a board has to be made safe between totally different foods. It does not mean a red board is never cleaned. Wash boards when they are soiled, between raw types if your method requires it, and always before they go back to the rack. A board that sits all afternoon under a film of chicken juice will contaminate the next chicken and the hands that move it.

The Agency allows the same board for raw meat and ready-to-eat food only where it can be heat-disinfected, for example in a commercial dishwasher. That machine has to be the right cycle, with the temperature and the chemical the manufacturer states, not a quick domestic wash that fogs the plastic. If you rely on a dishwasher, write the cycle, who unloads it, and the rule that a board is not used for salad until that cycle is finished. Air-drying beats a dirty tea towel. If the dishwasher is broken, you do not "do it in the sink for today" and carry on with one board unless your safe method has a sink method that meets the disinfection standard. Most small kitchens should stop dual use and keep the colours strict until the machine is back.

Where you wash by hand, use two stages. Remove the grease and food with hot water and detergent. Then disinfect with a product that meets the officially recognised standards in the Food Standards Agency's E. coli cross-contamination guidance, at the dilution and for the contact time on the label. Spraying a sanitiser onto a board that is still covered in fat, and wiping it off at once, does not disinfect it. The surface has to be clean before the disinfectant can work, and the chemical has to be left for the time the label states. Use a sink for this, not the wash-hand basin. Do not mix raw boards and ready-to-eat boards in the same water and call the second one clean because you wiped it afterwards with the same cloth.

Do not wash raw chicken, or other raw meat, in the sink to "clean" it. The Agency warns that splashes spread bacteria further than the board. Pat dry if you must, on the raw side, and keep the splash zone away from salad and from clean boards. Rinse salad and fruit in a food sink, under running water, on the ready-to-eat side of the method. Soil goes into that sink, not into the hand basin and not onto the white board.

When a board should be thrown away

Deep cuts hold food and bacteria. A scored board cannot be disinfected reliably, whether it is plastic or wood, because the knife grooves protect the dirt from the chemical and from the dishwasher jet. Stains that will not shift, a warp that rocks on the bench, a smell that survives washing, and loose corners are all reasons to replace the board. Thin boards that have gone fuzzy at the edges shed plastic into food. That is a foreign body as well as a hygiene failure.

Wooden boards are traditional for bread in some kitchens. They are a poor choice for raw meat. Wood that is scored or wet is difficult to disinfect, and the Agency's cross-contamination guidance expects equipment to be capable of being cleaned effectively. If you keep a wooden board, limit it in the safe method to a ready-to-eat job such as bread, keep it in good condition, wash it so it can dry, and do not put raw meat on it "just this once". Many businesses simply use plastic for everything and retire wood. That is the easier rule to supervise.

Have spares. A colour code collapses the day the only green board is in the dishwasher and a cook needs salad now. They will use red. A spare green board, stored with the ready-to-eat set, costs less than the food you will throw away and less than the visit that finds raw chicken on the salad board. Replace boards on a schedule you can afford, and also the moment a board fails the "would I eat from this surface?" test. Put the replacement on the maintenance list, not on a wish list.

Allergens are a different kind of separate

A purple board is a common extra for a defined allergen job, such as a gluten-free sandwich made in a controlled gap in service. It does not, by itself, make the food free from anything. Allergens are proteins. A disinfectant that kills bacteria does not "kill" an allergen. The control is physical removal: a clean board, clean knives, clean hands, a clean area, and ingredients that actually match the claim. If the purple board was washed in water that just held ordinary bread, it is not ready for a gluten-free order. If the knife is the white-handled one that cut a cheese and onion sandwich, the colour of the board is irrelevant.

Natasha's Law and the 14 allergens are a labelling and information duty as well as a preparation duty. The allergen guide covers the matrix and prepacked for direct sale food. Use the purple board only if the safe method says what it is for, who may use it, how it is washed, and where it is stored so it does not pick up flour dust. Some kitchens do not use purple at all. They use a full clean of a dedicated ready-to-eat area and a written allergen procedure. Either approach can work. A purple board with no procedure is a colour, not a control. Never tell a customer the meal is safe because "we used the purple board" if the fryer, the glove and the sauce were shared.

Complex equipment is not a chopping board

Slicers, mincers, vacuum-packing machines and processors with crevices are what the Agency calls complex equipment. They should not be used for both raw and ready-to-eat food in a normal working day. Colour-coded tape on a slicer does not change that. To switch a slicer from raw meat to cooked ham you would have to dismantle it and clean and disinfect every surface, which is not a job between two tickets. The safe method should say, in one line, what each machine is for. A common and defensible rule is: the slicer is for ready-to-eat food only; raw meat is cut on the red board and is not put through that machine.

If a business truly must change the use of a complex machine, follow the Agency's E. coli cross-contamination guidance rather than inventing a rinse. That guidance expects a full dismantle and an effective disinfection, not a wipe of the blade. Vacuum packers used for both raw and ready-to-eat food are a known cause of serious incidents because juices are sucked into places a cloth does not reach. Do not let a colour code on boards give false comfort about a dual-use slicer in the corner. They are different controls. Write both.

What to record

The day-to-day record is small. The method and the failures are what an officer reads.

• The safe method. The colours you use, what each one means, where boards and knives are stored, how they are washed, and what happens if the dishwasher is down. Name complex machines that are ready-to-eat only.
• Opening or extra checks. Enough boards of each colour, none of them badly scored, stored in the right place, with soap and sanitiser available for the sink method you rely on. A missing red board is a reason to pause raw prep, not a reason to borrow green.
• Training. New starters shown the code on their first food shift, with a question later: which board for raw chicken, which for ham, which for a soil-covered potato. The training record should reflect that conversation.
• Exceptions. The day the wrong board was used, the food you threw away, the board you replaced, and any customer allergen near-miss. Use the corrective action shape: problem, immediate action, what you changed.

You do not log every sandwich. You do log the moment the system broke, because that is how the 4-weekly review sees a pattern. Three "wrong board" notes in a month means the storage, the spares or the supervision is wrong. One note, with the food binned and the cook shown the rack again, is a system that is alive.

What environmental health officers check

Officers look at the boards in use, not at the poster in the office. They will often watch a raw job and the next ready-to-eat job, then look at the rack, the sink and the slicer.

• Whether staff can say what each colour means, and whether that matches the board they have in their hand.
• Whether raw and ready-to-eat boards, knives and cloths are actually separate.
• Whether boards are badly scored, stained, warped or stored wet in a mixed pile.
• Whether the wash method is real: a dishwasher that disinfects, or a two-stage sink wash with the right sanitiser and contact time.
• Whether raw food is stored below ready-to-eat food, and whether raw prep shares a splash zone with salad.
• Whether a slicer, mincer or vacuum packer is used for both raw and ready-to-eat food.
• Whether allergen claims rest on a colour alone, or on a written procedure and clean equipment.
• Whether the diary shows a wrong-board incident honestly, including the food that was thrown away.

Cross-contamination is scored under food hygiene. A team who cannot explain their own colours is also a confidence-in-management problem. The inspection checklist covers the rest of the visit. Do not hide the scored boards in a cupboard for the afternoon and bring them back at tea. Replace them. An officer who finds raw meat on a green board will not be calmed by a laminated chart.

Worked example

A small takeaway writes this code into the safe method: red for raw meat and poultry, blue for raw fish, yellow for cooked meat, green for salad and RTE garnish, white for bread and dairy, brown for vegetables that will be cooked. The slicer is ready-to-eat only. They have no commercial dishwasher. Boards are washed in two stages at the pot sink, with a sanitiser that meets the standard they have written down, left for the contact time on the label. Spares of red, green and white sit on the ready rack, raw and ready-to-eat separated.

At 5:40pm a new cook needs to portion raw chicken. The red board is in the sink, still dirty. The green board is on the bench because it was used for lettuce ten minutes ago, and the lettuce is still in a bowl beside it. The cook puts the chicken on the green board because it is the nearest clear space. The supervisor sees it before the chicken is fully cut, but after the board and the knife have had raw meat on them, and after a piece of lettuce has been pushed aside on that board.

The lettuce that was on the board, and any leaves that may have touched it, go in the waste. The knife goes with the raw knives. The green board is taken out of the ready-to-eat set for the rest of the service. They do not give it a quick wipe and put it back under the next salad. There is a spare green board on the rack, still clean and dry. Salad continues on that spare. The contaminated board is washed properly after the rush: detergent, rinse, sanitiser, contact time, air dry. The supervisor also notices the red board in use is deeply scored. It is binned, not returned to the rack. A new red board from the spare shelf replaces it that night, and a replacement spare is written on the order list.

The diary says: "17:40 raw chicken placed on the green salad board. Lettuce from that board binned. Green board taken out of RTE use, fully washed after service. Spare green used. Scored red board thrown away and replaced. Cook shown the rack. Reminder: if the red board is in the sink, wait or use the spare red, never green." They add a line to the opening check: red, green and white spares present and not scored. At the 4-weekly review they look for a repeat. There is not one. The cook can now answer which board is for chicken and which is for lettuce without looking at the poster. That is a working colour code, including the food they refused to serve.

Common mistakes

• A six-colour poster, and one white board that everyone actually uses.
• Using the salad board for raw chicken because the red board is being washed.
• Calling cooked meat "raw" because it is beef, and putting it back on the red board.
• One knife and one cloth shared across every colour.
• Washing raw and ready-to-eat boards in the same sink water and wiping them with the same cloth.
• Spraying sanitiser on a greasy board and wiping it straight off.
• Keeping a deeply scored board because it is "still flat".
• Putting raw meat on a wooden bread board for a single job.
• Using a purple board as the only allergen control.
• Running raw chicken and then cooked ham through the same slicer with a wipe between them.
• Storing wet raw boards stacked on top of ready-to-eat boards.

Where this comes from

This guide follows the Food Standards Agency's advice on avoiding cross-contamination: keep raw and ready-to-eat food separate, use different chopping boards and knives for raw meat or poultry and for ready-to-eat food unless the equipment is heat-disinfected in a commercial dishwasher, and do not rely on a wipe. It follows the Agency's E. coli O157 cross-contamination guidance on separating areas and equipment, on complex machines such as slicers and vacuum packers, and on disinfectants that meet officially recognised standards and are used as the label states. Colour lists in this article are a widely used catering practice so staff can see that separation. They are not a statutory colour chart. The Agency's pages on avoiding cross-contamination and on E. coli cross-contamination are the public starting point, with Safer Food, Better Business for caterers. Scottish businesses should follow Food Standards Scotland and CookSafe. Write the colours, the wash method and the machines you actually have into the safe method, and check during service that the board in use is the board you named.