Colour-coded equipment prevents bacteria from being transferred from, for example, toilet to kitchen. A common Danish model is red/yellow/blue/green — but sources vary, so let the workplace define its own overview. Here is the hygiene logic behind it, the link to HACCP and NIR, and a checklist for implementing the system.
Introduction
The purpose of colour coding is to reduce cross-contamination — that is, to avoid transferring bacteria from one area to another, e.g. from toilet to kitchen. It is especially critical under HACCP in food businesses.
The hygienic logic behind
Colour coding works because it physically separates equipment used in zones with different infection risk. A cloth that has been on a toilet carries bowel bacteria; if used afterwards in the kitchen, the bacteria are transferred to food contact surfaces. By giving each zone its own colour, it becomes impossible to accidentally use the 'toilet cloth' in the kitchen — the rule becomes visible and easy to check. The system supports two basic principles: separate zones (each risk zone has its own equipment) and clean-to-dirty working direction (you work from the cleanest surfaces towards the most contaminated, never the other way round).
A common Danish model
| Colour | Area |
|---|---|
| Red | Toilets / sanitary fittings |
| Yellow | Kitchen — cooking and serving surfaces |
| Blue | General surfaces (tables, window sills, electronics) |
| Green | High-level cleaning (mirrors, glass, chrome) |
HACCP and the food area
In food businesses, colour coding is not just good practice — it relates to the statutory self-inspection. The Food Hygiene Regulation requires businesses to work according to HACCP principles and keep premises and equipment clean so food is not contaminated. Cleaning is one of the preventive baseline programmes (prerequisite programmes) here, and separate, colour-coded equipment is the practical way to prevent cross-contamination between, for example, raw material zone, food contact surfaces and sanitary facilities. Combined with documented self-inspection (who did what, when), the colour coding helps make cleaning verifiable to the Food and Veterinary Administration.
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