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Re: Firefox visual focus indication


From: Beranek, Nicholas
Date: Sep 28, 2017 10:37AM

Using the default browser focus indicator is a sufficient technique: https://www.w3.org/TR/2016/NOTE-WCAG20-TECHS-20161007/G165

It becomes a failure when the focus indicator is suppressed via CSS through means of outline: none, for example (see www.outlinenone.com for more details!).

If you roll your own, you need to ensure that it's "highly visible". WCAG does not define this term, but we have interpreted it to mean that we should strive for a 4.5 to 1 color contrast ratio.

Nick Beranek
Capital One

-----Original Message-----
From: WebAIM-Forum [mailto: <EMAIL REMOVED> ] On Behalf Of Patrick H. Lauke
Sent: Thursday, September 28, 2017 12:31 PM
Subject: Re: [WebAIM] Firefox visual focus indication

On 28/09/2017 17:22, Schafer, Carmen wrote:
> Are others considering it a violation of 2.4.7 (Focus Visible) when a website doesn't enhance the browser's default focus indicator since Firefox's default thin black dotted line focus indicator is difficult to see yet Chrome has a more distinct default focus indicator (solid blue line)?
> I just want to be clear what is considered a true violation of 2.4.7.

Taking a strict reading of WCAG 2, there's no real requirement for how "visible" a focus indicator needs to be (as "visible" is not really a testable adjective).


So going strictly by WCAG 2, an indicator that's difficult to see is still "visible", so you'd pass it...but I would definitely note that although it passes nominally, it's really insufficient and the author should provide an explicit strong indicator.

Patrick H. Lauke

www.splintered.co.uk | https://github.com/patrickhlauke http://flickr.com/photos/redux/ | http://redux.deviantart.com
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