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low light contrast ration calculation

From: Daniels,Rachael <Rachael.Daniels@Cerner.com>
Date: Wed, 23 Aug 2017 18:11:32 +0000
To: "public-low-vision-comments@w3.org" <public-low-vision-comments@w3.org>
Message-ID: <CY1PR0101MB157841925785C61569244EC69E850@CY1PR0101MB1578.prod.exchangelabs.com>

The current contrast ratio formula does not take into low lighting conditions, and instead only accounts for normal ambient light. What is the contrast ratio formula that I can use to ensure we are following standards for low lighting conditions?

Thank you,

Rachael  Daniels
Sr. Human Factors Team Lead, User Experience
rachael.daniels@cerner.com<mailto:rachael.daniels@cerner.com> | 816.888.2663 direct
Cerner Corporation | www.cerner.com<http://www.cerner.com>

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Received on Thursday, 24 August 2017 14:16:31 UTC

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