Edgardo Garcia’s ColorTools add-in Excel can do much more than calculating dE00. https://rgbcmyk.com.ar/en/colortools-home/ It calculates the dE00 as 2.86971236. - Refik From: Kneringer Clemens <office@kneringer.com> Date: 28 August 2024 Wednesday 18:16 To: "rtelhan@icloud.com" <rtelhan@icloud.com> Cc: Paul Yntema <Paul@bigimpact.com>, <colorsync-users@lists.apple.com> Subject: Re: formula DeltaE2000 Delta E (CIE 2000)brucelindbloom.com Regards Clemens Clemens Kneringer - CameraWork Zehetnergasse 44 1140 Wien mobil:     +43.650.camwork (+43.650.226.96.75) mail:     office@kneringer.con www.camerawork.at Am 28.08.2024 um 16:25 schrieb Refik Telhan via colorsync-users <colorsync-users@lists.apple.com>: Hi Paul, The two dE00 calculators I have, at KL=KC=KH=1, return the same result at a different precision level, 2.8697124 and 2.8697. Best regards, - Refik -------------------------------------------------------- Refik Telhan, EE B.Sc. Light and Color Management Consultancy A16A Blok D17, Bahceli Sokak 3, Buyuksehir Mahallesi, Beylikduzu, 34520, Istanbul, Turkey e-Mail: rtelhan@icloud.com Mobile: + (90) (532) 426 21 87 -------------------------------------------------------- -----Original Message----- From: Paul Yntema via colorsync-users <colorsync-users@lists.apple.com <mailto:colorsync-users@lists.apple.com>> Reply-To: Paul Yntema <Paul@bigimpact.com <mailto:Paul@bigimpact.com>> Date: 28 August 2024 Wednesday 16:16 To: "colorsync-users@lists.apple.com <mailto:colorsync-users@lists.apple.com>" <colorsync-users@lists.apple.com <mailto:colorsync-users@lists.apple.com>> Subject: formula DeltaE2000 Hello, Can somebody tell me that the outcome of deltaE00 2,87 or deltaE00 5,74 is correct with the next values: - reference L=41,880 a=3,500 b= -33,190 - measure L=40,488 a=9,092 b= -37,342 I try to use the formula in a PHP or javascript environment but I think there is a small error in it… Maybe someone has the right formula for me. Thanks in advance! grz. Paul Yntema _______________________________________________ Do not post admin requests to the list. They will be ignored. colorsync-users mailing list (colorsync-users@lists.apple.com <mailto:colorsync-users@lists.apple.com>) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/rtelhan%40icloud.com <https://lists.apple.com/mailman/options/colorsync-users/rtelhan%40icloud.com> This email sent to rtelhan@icloud.com <mailto:rtelhan@icloud.com> _______________________________________________ Do not post admin requests to the list. They will be ignored. colorsync-users mailing list (colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/office%40kneringer.c... This email sent to office@kneringer.com