ISO INTERNATIONAL STANDARD 24505 First edition 2016-04-01 Ergonomics Accessible design - Method for creating colour combinations taking account of age- related changes in human colour vision Ergonomie Conception accessible - Méthode de création de combinaisons de couleurs tenant compte des changements liés a I'age danslavisionencouleurshumaine Reference number IS0 24505:2016(E) ISO International Organization for Standardization ZHEJIANG INSTOF STANDARDIZATION C15956617 @IS02016 ed without license from IHS IS0 24505:2016(E) COPYRIGHT PROTECTEDDOCUMENT IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Licensee-ZHEJIANG INST OF STANDARDIZAISQ 0d6 - All rights reserved Not for Resale, 2016/6/2 08:54:24 networking permited without license from IHS IS0 24505:2016(E) Contents Page Foreword ..iv Introduction .V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions ..1 4 Factors affecting conspicuity of colour combinations .2 4.1 General .2 4.2 Luminance level 2 4.3 Ageing effect .2 4.4 Viewing mode and condition .3 5 Colour combinations using fundamental colours and their conspicuity .3 5.1 Fundamental colours and their combinations .3 5.2 Classificationoftheconspicuityofcolourcombinations .4 5.3 Tables of two-colour combinations of fundamental colours and their conspicuity 5 5.4 Span1offundamentalcolours 7 6 Procedures to create a colour combination ..8 Annex A (normative) Spans of fundamental colours (Span 2) ..14 Annex B (informative) Colouring example: A train network ..22 Annex C (informative) Guidance for transformation of Munsell colour system to CIE XYz system and to sRGB system in monitor displays ..24 Bibliography .25 ii thout license from IHS