EN IS0/CIE 11664-5 EUROPEANSTANDARD NORME EUROPEENNE EUROPAISCHE NORM June 2024 ICS 17.180.20 Supersedes EN IS0 11664-5:2016 English Version Colorimetry - Part 5: CIE 1976 L*u*v* colour space and u', v' uniform chromaticity scale diagram (IS0/CIE 11664- 5:2024) Colorimétrie - Partie 5: Espace chromatique L*u*v* et Farbmetrik - Teil 5: CIE 1976 L*u*v*-Farbenraum und diagramme de chromaticité uniforme u', v' CIE 1976 gleichabstandige u', v'-Farbtafel (ISO/CIE 11664- (IS0/CIE11664-5:2024) 5:2024) This European Standard was approved by CEN on 29 May 2024. 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 Centre has the same status as the official versions. CENmembers arethenationalstandardsbodiesof Austria,Belgium,Bulgaria,Croatia,Cyprus, CzechRepublic, 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,Turkiyeand United Kingdom. cen EUROPEAN COMMITTEEFOR STANDARDIZATION COMITEEUROPEENDENORMALISATION EUROPAISCHES KOMITEE FUR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2024CEN All rights of exploitation in any form and by any means reserved Ref.No.ENISO/CIE11664-5:2024E worldwidefor CEN national Members. EN IS0/CIE 11664-5:2024 (E) Contents Page European foreword.. 2 EN IS0/CIE 11664-5:2024 (E) European foreword This document (EN IS0/CIE 11664-5:2024) has been prepared by Technical Committee IS0/TC 274 "Light and lighting" in collaboration with Technical Committee CEN/TC 139 "Paints and varnishes" the secretariat of which is held by DIN. 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of an identical text or by endorsement, at the latest by December 2024, and conflicting national standards shall be withdrawn at the latest by December 2024. 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 This document supersedes EN IS0 11664-5:2016. Any feedback and questions on this document should be directed to the users' national standards body/national committee. 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, Turkiye and the United Kingdom. Endorsement notice The text of IS0/CIE 11664-5:2024 has been approved by CEN as EN IS0/CIE 11664-5:2024 without any modification. 3