Windows High Contrast mode (was Re: Warning: The Understanding Reflow gonly 200% text)

Hi Erich and all,

Last February Jon put forward GitHub issue 623: "Do issues with
Windows high contrast mode fall under WCAG 2.1?:
https://github.com/w3c/wcag/issues/623

If that issue doesn't cover your concerns, maybe raise another issue?
https://github.com/w3c/wcag/issues/new

Kindest Regards,
Laura

On 3/19/19, Erich Manser <emanser@us.ibm.com> wrote:
> Hello LVTF,
> Hope everyone's been well.
>
> Some of my IBM colleagues have raised some considerations/concerns having
> to do with Windows High Contrast mode.
>
> How best to bring forward at the present time?
>
> Thanks for any info!
>
>                     Erich Manser
>
>                     IBM
>
>                     Accessibility
>
>                     Design
>
>                     Littleton,
>
>                     MA / tel:
>
>                     978-696-1810
>
>
>
>
>
>
>
>
>
>
>
> You don't need eyesight to have vision.
>
>
>
> From: Alastair Campbell <acampbell@nomensa.com>
> To: Wayne Dick <wayneedick@gmail.com>
> Cc: public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org>
> Date: 03/19/2019 06:28 AM
> Subject: Re: Warning: The Understanding Reflow gonly 200% text.
>
>
>
> Hi Wayne,
>
> This isn’t new, as I said we’ve been through this a couple of times:
> https://github.com/w3c/wcag/issues/391#issuecomment-401412278
>
> You have previously commented that sites generally don’t reduce the
> text-size at higher zoom levels because it would be hard for everyone
> trying to read it on a small screen – which is true.
>
>
>> Did we mean that authors could make text small as the page was zoomed?
> The following language in Understand Reflow implies this.
>
> Not “small”, but not necessarily 400%.
>
> Enforcing a flat percentage increase for text of varying sizes is not
> helpful. Large text increased to 400% will create a lot more scrolling, and
> we would be incentivising designers to use smaller headings & text to start
> with.
>
> (Seeing that your style sheets make headings the same size as regular text
> helped my understanding here.)
>
> We had good information from the LVTF, and I think Jon will agree the SC
> wasn’t adjusted because we didn’t believe him or didn’t understand the
> requirement.
>
> It was adjusted because there has to be a reasonable balance between the
> user-requirement and the demand on authors. Plus the un-intended
> consequence of increasing large text to 400%.
>
> We currently have two related requirements:
>          1.          Text size must be able to reach 200% of the default.
>          2.          Reflow must work down to 320px.
>
> When you put those together, the easiest thing is to allow text to increase
> x4. That’s the default. You have to put work in to reduce text size as
> smaller screen sizes.
>
> We’ve done dozens of 2.1 audits since last summer, and I don’t think we’ve
> had an instance where a site failed 1.4.4 whilst passing 1.4.10. In the
> vast majority of cases text would be 400%, except where it started very
> large.
>
> To plug what *might* be a gap I think a min-text-size approach would be
> best, but we’d need evidence to show there is an issue given the current
> requirements.
>
> I.e. Are there sites which currently pass 1.4.4 + 1.4.10 and reduce the
> text size at higher zoom levels to the 200-300% level?
>
> In the code the site would have to set text at 16px and then reduce it to
> 9-12px at larger zoom levels.
>
> Cheers,
>
> -Alastair
>
>


-- 
Laura L. Carlson

Received on Tuesday, 19 March 2019 13:18:58 UTC