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RE: High Contrast support with Browsers.

From: Patrick H. Lauke <redux@splintered.co.uk>
Date: Mon, 14 May 2018 16:49:38 +0100
To: Jim Allan <jimallan@tsbvi.edu>, "seanmmur@cisco.com" <seanmmur@cisco.com>
Cc: WAI-IG <w3c-wai-ig@w3.org>
Message-ID: <E1fIFje-00055d-01@titan.w3.org>
Noting that on certain operating systems (iOS, Android, macOS, others?), high contrast is a low-level setting that affects ALL output at the operating system level (what’s sent to the video card/monitor), while on others (Windows, others?), it’s a setting that software needs to be specifically coded to read and then support/implement.


From: Jim Allan
Sent: 14 May 2018 16:34
To: seanmmur@cisco.com
Subject: Re: High Contrast support with Browsers.

​Chrome does not respect High Contrast Mode (HCM​) in the OS. You must use an extension
respect OS HCM 
IE , EDGE - https://support.microsoft.com/en-us/help/13862/windows-use-high-contrast-mode
FireFox https://support.mozilla.org/en-US/kb/accessibility-features-firefox-make-firefox-and-we#w_using-a-high-contrast-theme
Safari https://www.apple.com/accessibility/mac/vision/

On Tue, May 8, 2018 at 9:23 PM Sean Murphy (seanmmur) <seanmmur@cisco.com> wrote:
General query in relation to high contrast with browsers. Should the browser honor the OS high contrast settings or should the CSS override the OS high contrast? My view is the browser should honor the OS high contrast settings. Not sure if this is the case now.
Sean Murphy
Accessibility Software ENGINEER
Tel: +61 2 8446 7751
Cisco Systems, Inc.
The Forum 201 Pacific Highway
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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/
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Received on Monday, 14 May 2018 15:50:04 UTC

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