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RE: Contrast ratio 4.5:1 applies to rollovers?

From: Jonathan Avila <jon.avila@ssbbartgroup.com>
Date: Tue, 23 Oct 2012 12:26:24 -0400
Message-ID: <10d216cd096ccbef66bb7dc56fe976a1@mail.gmail.com>
To: w3c-wai-ig@w3.org
Unavailable or disabled user interface items are likely the only ones other
than essential branding/logos, etc. that do not have to meet the contrast
requirements.



There are a few other items that must follow contrast requirements that
people often forget too.  These involve color differentiation:

·         Linked and non-linked text when color alone is used to indicate
links

·         Custom focus rectangles



Jonathan



*From:* randomlife67@gmail.com [mailto:randomlife67@gmail.com] *On Behalf
Of *David Ashleydale
*Sent:* Tuesday, October 23, 2012 12:18 PM
*To:* Lea Verou
*Cc:* Charles McCathie Nevile; w3c-wai-ig@w3.org; Samantha Bird
*Subject:* Re: Contrast ratio 4.5:1 applies to rollovers?



Hi Lea,



I think it's probably safe to say that any text on any page should strive
to at least meet the sufficient color contrast standard. I agree that
sometimes there is a need to have a visual element "pull back" from
everything else because it can be visually distracting to have everything *
"ON"*. But I think that can be done in a way to ensure that everything is
still readable by everyone.



Thanks,

David

On Tue, Oct 23, 2012 at 8:30 AM, Lea Verou <lea@w3.org> wrote:

What about the opposite? I.e., if text in a rollover and/or focused state
has sufficient contrast ratio, but not in the normal state.
This is commonly used for secondary elements to avoid having them distract
from the main content, so I think it's also an interesting question.

Lea Verou
W3C developer relations
http://w3.org/people/all#leahttp://lea.verou.me ✿ @leaverou







On Oct 23, 2012, at 08:22, Charles McCathie Nevile wrote:

> On Mon, 22 Oct 2012 16:55:29 +0200, Samantha Bird <sbird@nmqa.com> wrote:
>
>> Hi All,
>>> I just wanted to check the rules for contrast ratios when it comes to
rollovers. As far as I know in order to meet level AA, >the contrast ratio
must meet 4.5:1 except in the following circumstances:
> [...]
>> I am not sure if rollover states would come under the 'incidental' rule
or whether the contrast ratio does not need to be >taken into account for
rollover states as the rollover just emphasises a change in state. Any
guidance here would be much >appreciated.
>
> Hi Samantha,
>
> typically text in a rollover state is actually the most important text on
a page at that moment. So no exception would apply, and it is actually
extra important that something being highlighted is clear enough to read.
>
> cheers
>
> Chaals
>
> --
> Charles McCathie Nevile - Consultant (web standards) CTO Office, Yandex
>        chaals@yandex-team.ru         Find more at http://yandex.com
>
Received on Tuesday, 23 October 2012 16:26:57 GMT

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