WebAIM - Web Accessibility In Mind

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Re: Background changing


From: Karl Brown
Date: May 23, 2017 2:01AM

2.2.2 <https://www.w3.org/TR/WCAG20/#time-limits-pause> *might *come into
play, even though the images are decorative. Because they're changing and
give some form of information* I'd certainly want to be able to pause it.

I say information*, because it's more in keeping with how a brand wants to
be seen. If the images are totally decorative (could be swapped out with no
loss of understanding from the user) then it'll be harder to argue from a
WCAG perspective.

Away from the guidelines, you're right. People with some cognitive issues
may wonder what's going on and become distressed. And users who zoom in may
end up having issues reading the text as the text gets bigger and spills
over more of the image, which could lead into a failure for colour

If the company are using a CMS, there's one other thing they should
consider for accessibility. A typical CMS user doesn't understand web
accessibility, nor does the average marketing professional, so colour
contrast is very likely to fail over time as users switch the images for
new ones. The only way around that is to code something like a block
background colour behind the text, which'll defeat the usual purpose of
text over images.

I'd be interested to hear what everyone else thinks?

On Mon, May 22, 2017 at 9:15 PM, Gosia Wheeler < <EMAIL REMOVED> >

> I would like to hear your accessibility feedback on the following scenario:
> I'm testing a desktop website with static text but the background image is
> changing. There are four different decorative images used for the
> background, shifting from one to the other every 9 seconds. There is
> sufficient contrast between the foreground text and the background image.
> Do you think it needs a Play/Pause button, or should the image rotation
> stop after a certain number of cycles, or maybe it is fine as is?
> I'm concerned that for people with cognitive disabilities and those with
> low vision that magnify the screen, the background changing will be too
> confusing and they will not be able to tell if the images bring any value
> to the website experience or not.
> Please share your feedback.
> > > > >

Karl Brown
Twitter: @kbdevelops
Skype: kbdevelopment

Professional Certificate Web Accessibility Compliance (Distinction),
University of South Australia, 2015