RE: High Contrast support with Browsers.

This is good info. The key is how to influence the OS Vendors. AS the high contrast and simular low vision features must be a part of the OS Universal accessibility support. The applications should support the OS settings as a minimum. Ideally provide extra support on top. I am referring to the actual Browser application here.

The Web Application should also honor what the Browser exposes and provide extra options which is the owner of the web site responsibility.

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Sean Murphy
SR ENGINEER.SOFTWARE ENGINEERING
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Tel: +61 2 8446 7751










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Regards
Sean

From: Wayne Dick <waynedick@knowbility.org>
Sent: Wednesday, 6 June 2018 8:26 AM
To: Jonathan Avila <jon.avila@levelaccess.com>
Cc: Ian Sharpe <themanxsharpy@gmail.com>; WAI Interest Group <w3c-wai-ig@w3.org>
Subject: Re: High Contrast support with Browsers.

The high contrast is a serious problem. More generally the access to color framework is just as important. The problem hinges on how we permit and test color access.

Our policies also leave people who need low brightness out. The terminal dimming only goes so far if the basic colors are problematic to the reader. This is a documented user need that was identified by the LVTF Requirements document.

We could not solve it this time around, but it needs solving. I think we need to do some baseline testing.

Wayne

On Wed, May 30, 2018 at 6:13 AM, Jonathan Avila <jon.avila@levelaccess.com<mailto:jon.avila@levelaccess.com>> wrote:
On Windows there is a flag for high contrast (SPI_GETHIGHCONTRAST)
https://msdn.microsoft.com/en-us/library/windows/desktop/dd318443(v=vs.85).aspx

Jonathan

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From: Ian Sharpe <themanxsharpy@gmail.com<mailto:themanxsharpy@gmail.com>>
Sent: Thursday, May 10, 2018 6:35 AM
To: Jonathan Avila <jon.avila@levelaccess.com<mailto:jon.avila@levelaccess.com>>; WAI Interest Group <w3c-wai-ig@w3.org<mailto:w3c-wai-ig@w3.org>>
Subject: RE: High Contrast support with Browsers.

From an accessibility perspective, I feel all apps, including the browser, should respect native OS settings / colour scheme etc. However, I’m not sure it makes sense for apps to respect the native OS theme in all cases, as many people may use a different colour scheme for any number of reasons,  including personal preference. I think these users would actually be more surprised / confused if they went to a site of a well-known brand and the site was displayed using their native OS theme instead of the usual branding for example? I’m not sure marketing types who spend a lot of money on website branding / colour schemes would be particularly happy either?

That said, for me at least on Windows 10 using the inverted high-contrast theme, both Firefox and Edge respect the native colour scheme, but Chrome doesn’t, so it would seem there is some ambiguity around this issue?

I guess the obvious next question then is how is the browser expected to *know* when a user is using a high-contrast or custom theme for accessibility reasons across all possible platforms?

May be FF and Edge are making assumptions on the basis that I am using a high-contrast theme (set via ease of access settings), or because I’m using a screen reader or have other accessibility settings enabled, which for my particular use case is great as I didn’t have to do anything to get my desired behaviour, and I would prefer it if Chrome adopted the same approach as well. But I’m not sure how feasible this approach might be for all platforms? Indeed, what about the case when a user creates a custom theme for accessibility reasons but makes no other accomodations?

Based on the above, here’s my proposed logic:

If an app can determine whether the OS has been customized for accessibility reasons, the app (including browsers) should respect these settings by default, so that the user is not required to do anything themselves.

If the app isn’t able to make this assumption, the app should do nothing by default, but should provide a switch to enable the user to change the behaviour of the app to respect native OS settings if required.

Cheers
Ian















From: Jonathan Avila<mailto:jon.avila@levelaccess.com>
Sent: 09 May 2018 12:33
To: WAI Interest Group<mailto:w3c-wai-ig@w3.org>
Subject: Re: High Contrast support with Browsers.

I would consider the need for high contrast applicable.   We do have some techniques to support it such as Failure F3 relates to background images when css images are not displayed.

Jonathan
Sent from my iPhone

On May 8, 2018, at 10:23 PM, Sean Murphy (seanmmur) <seanmmur@cisco.com<mailto:seanmmur@cisco.com>> wrote:
All,

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.


Regards
Sean Murphy
Accessibility Software ENGINEER
seanmmur@cisco.com<mailto:seanmmur@cisco.com>
Tel: +61 2 8446 7751

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