EN ISO 22324:2025
(Main)Security and resilience - Emergency management - Guidelines for colour-coded alert (ISO 22324:2022)
Security and resilience - Emergency management - Guidelines for colour-coded alert (ISO 22324:2022)
This document gives guidance on the use of colour codes to inform people at risk as well as first response personnel about danger and to express the severity of a situation.
This document is applicable to all types of hazard in any location.
This document does not apply to the method for displaying colour codes, detailed ergonomic considerations related to viewing displays or safety signs covered by ISO 3864-1.
Sicherheit und Schutz des Gemeinwesens - Gefahrenabwehr - Farbkodierungen zur Warnung der Bevölkerung (ISO 22324:2022)
Sécurité et résilience - Gestion des situations d'urgence - Lignes directrices relatives aux alertes par code couleur (ISO 22324:2022)
Varnost in vzdržljivost - Upravljanje v izrednih razmerah - Smernice za barvno kodirano opozarjanje (ISO 22324:2022)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2025
Varnost in vzdržljivost - Upravljanje v izrednih razmerah - Smernice za barvno
kodirano opozarjanje (ISO 22324:2022)
Security and resilience - Emergency management - Guidelines for colour-coded alert
(ISO 22324:2022)
Sicherheit und Schutz des Gemeinwesens - Gefahrenabwehr - Farbkodierungen zur
Warnung der Bevölkerung (ISO 22324:2022)
Sécurité et résilience - Gestion des situations d'urgence - Lignes directrices relatives aux
alertes par code couleur (ISO 22324:2022)
Ta slovenski standard je istoveten z: EN ISO 22324:2025
ICS:
01.070 Barvno kodiranje Colour coding
03.100.01 Organizacija in vodenje Company organization and
podjetja na splošno management in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 22324
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2025
EUROPÄISCHE NORM
ICS 01.070; 03.100.01
English Version
Security and resilience - Emergency management -
Guidelines for colour-coded alert (ISO 22324:2022)
Sécurité et résilience - Gestion des situations d'urgence Sicherheit und Schutz des Gemeinwesens -
- Lignes directrices relatives aux alertes par code Gefahrenabwehr - Farbkodierungen zur Warnung der
couleur (ISO 22324:2022) Bevölkerung (ISO 22324:2022)
This European Standard was approved by CEN on 11 May 2025.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22324:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 22324:2022 has been prepared by Technical Committee ISO/TC 292 "Security and
resilience” of the International Organization for Standardization (ISO) and has been taken over as
of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2025, and conflicting national standards
shall be withdrawn at the latest by November 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 22324:2022 has been approved by CEN as EN ISO 22324:2025 without any modification.
INTERNATIONAL ISO
STANDARD 22324
Second edition
2022-12
Security and resilience – Emergency
management – Guidelines for colour-
coded alert
Sécurité et résilience – Gestion des situations d'urgence – Lignes
directrices relatives aux alertes par code couleur
Reference number
ISO 22324:2022(E)
ISO 22324:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 22324:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Guidance for use of colour codes . 1
4.1 General . 1
4.2 Colour codes to express the status of hazard . 1
4.2.1 General . 1
4.2.2 Typical colours for colour-coding system . 2
4.2.3 Order and position for the red, yellow and green spectrum . 2
4.3 Colour codes to give supplementary information . 3
4.3.1 General . 3
4.3.2 Black and purple . 3
4.3.3 Blue . 4
4.3.4 Grey . 4
4.4 Consideration for human factors and colour blindness . 4
4.4.1 General . 4
4.4.2 Colour names . 4
4.4.3 Text colours . 4
Annex A (informative) Examples on the use of colour codes in practice .6
Annex B (informative) Recommendations for colour selection . 9
Bibliography .11
iii
ISO 22324:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 292, Security and resilience.
This second edition cancels and replaces the first edition (ISO 22324:2015), of which it constitutes a
minor revision.
The changes are as follows:
— the title has been updated;
— references to guidance in other relevant standards have been added;
— the Bibliography has been updated.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
ISO 22324:2022(E)
Introduction
People can be faced in their daily lives with various kinds of risks. People at risk should be able to take
appropriate safety actions when faced with hazards even if they do not have a full understanding of
them.
Public warnings, through a combination of prior notifications and alerts, enable people at risk to take
appropriate and timely actions to protect their safety. ISO 22322 provides further guidance on public
warning.
Colour-coded alerts are used to notify people at risk of status changes on a safety or danger continuum
in allowing them to take appropriate actions.
This document will lead to better understanding of colour-coded alerts by reducing confusion and
prompting more appropriate responses in an emergency situation.
v
INTERNATIONAL STANDARD ISO 22324:2022(E)
Security and resilience – Emergency management –
Guidelines for colour-coded alert
1 Scope
This document gives guidance on the use of colour codes to inform people at risk as well as first
response personnel about danger and to express the severity of a situation.
This document is applicable to all types of hazard in any location.
This document does not apply to the method for displaying colour codes, detailed ergonomic
considerations related to viewing displays or safety signs covered by ISO 3864-1.
2 N
...
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