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Re: low light contrast ration calculation

From: Jim Allan <jimallan@tsbvi.edu>
Date: Thu, 24 Aug 2017 14:10:50 -0500
Message-ID: <CA+=z1WkWP-dLTAdJgAV1EK+KYH3K+2rWFXFJWVTNf=KjbnZ=zQ@mail.gmail.com>
To: "Daniels,Rachael" <Rachael.Daniels@cerner.com>
Cc: "public-low-vision-comments@w3.org" <public-low-vision-comments@w3.org>
WCAG20 has the provided the stated contrast ratios. And it provide this
additional information
https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html

There are no other WCAG20  contrast ratios.

Jim

On Wed, Aug 23, 2017 at 1:11 PM, Daniels,Rachael <Rachael.Daniels@cerner.com
> wrote:

> Hello!
>
>
>
> 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
>
>
>
> *Rachael * *Daniels*
> Sr. Human Factors Team Lead*, *User Experience
> rachael.daniels@cerner.com | 816.888.2663 <(816)%20888-2663> direct
> Cerner Corporation | www.cerner.com
>
>
>
>
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-- 
Jim Allan, Accessibility Coordinator
Texas School for the Blind and Visually Impaired
1100 W. 45th St., Austin, Texas 78756
voice 512.206.9315    fax: 512.206.9452 http://www.tsbvi.edu/
"We shape our tools and thereafter our tools shape us." McLuhan, 1964
Received on Thursday, 24 August 2017 19:11:14 UTC

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