Re: CFC - Graphics Contrast

Jon,

I agree with you on this. However the difference in contrast between the 
non-hover state and the hover state does not need to meet a 3:1 ratio.

regards,

James


On 11/16/2017 9:00 AM, Jonathan Avila wrote:
>
> Hover on contrast of text is already covered under SC 1.4.3 per this 
> group.  A user with magnification may be using a pointing device and 
> needs to be able to see the content under the pointing device in 
> sufficient contrast.
>
> The minimum contrast success criterion (1.4.3) applies to text in the 
> page, including placeholder text and text that is shown when a pointer 
> is hovering over an object or when an object has keyboard focus. If 
> any of these are used in a page, the text needs to provide sufficient 
> contrast. 
> (https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-contrast.html)
>
> Jonathan.
>
> Jonathan Avila
>
> Chief Accessibility Officer
>
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> *From:*James Nurthen [mailto:james.nurthen@oracle.com]
> *Sent:* Thursday, November 16, 2017 11:32 AM
> *To:* w3c-wai-gl@w3.org
> *Subject:* Re: CFC - Graphics Contrast
>
> No it would not. 1.4.1 does not mention the word state and include a 
> definition which includes hover. Hover does not fit into the things 
> which fail 1.4.1
>
> Take for example the page 
> https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-contrast-without-color.html 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.w3.org_TR_UNDERSTANDING-2DWCAG20_visual-2Daudio-2Dcontrast-2Dwithout-2Dcolor.html&d=DwMGaQ&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=CIHu8rc_0wRTTC_7DvWtiGNKjpA-3oTgbu_6ve6hP0I&m=azTSzRxVPTS09ZTpHYZ8tYh83UMk-5FTgeehLv0ldMQ&s=jreCk1vz8JLIIkxHL-l2uH6Lbf2F7USEOJeGlFz9RR4&e=>
>
> There are contents, intro, Previous and Next buttons at the top of the 
> page. The only difference when they are hovered is the background color.
>
> The background color is #dde and the hover background color is #aae
>
> The ratio between these is 1.6:1
>
> I would not fail this page and I object to any SC which would fail 
> this. My current reading of this new SC along with the definition of 
> state proposed would and hence I object.
>
> On 11/16/2017 7:54 AM, Repsher, Stephen J wrote:
>
>     Adding to what Alastair is saying, I’m confused by the objection
>     because, as you pointed out, using color alone to differentiate
>     between hover and non-hover would be a violation of 1.4.1.  Only
>     when the 2 states are adjacent and touching would this SC come
>     into play, but the 3:1 ratio requirement is the same.
>
>     Steve
>
>     *From:*Alastair Campbell [mailto:acampbell@nomensa.com]
>     *Sent:* Thursday, November 16, 2017 3:03 AM
>     *To:* James Nurthen <james.nurthen@oracle.com>
>     <mailto:james.nurthen@oracle.com>
>     *Cc:* WCAG <w3c-wai-gl@w3.org> <mailto:w3c-wai-gl@w3.org>
>     *Subject:* RE: CFC - Graphics Contrast
>
>     > Requiring hover to have sufficient contrast ratio to non-hover states has no accessibility
>     requirements behind it as far as I know and would unnecessarily
>     limit color choices in an already limited palette.
>
>     Hi James,
>
>     I don’t think that was discussed directly, but in order for that
>     to be an issue the controls in different states would have to be
>     adjacent, i.e. touching. Even without a mention of states, I think
>     that would be an issue in current WCAG conformance.
>
>     There was some discussion about whether ‘existing’ was a state,
>     and people thought that wasn’t clear so ‘boundaries’ was added:
>
>     “Visual information used to indicate states and boundaries of
>     active user interface components”
>
>     (Still with the intent that if it isn’t there, you don’t have to
>     add something.)
>
>     Does that help?
>
>     -Alastair
>
> -- 
> Regards, James
>
> James Nurthen | Principal Engineer, Accessibility
> Phone: +1 650 506 6781 <tel:+1%20650%20506%206781> | Mobile: +1 415 
> 987 1918 <tel:+1%20415%20987%201918> | Video: james.nurthen@oracle.com 
> <sip:james.nurthen@oracle.com>
> OracleCorporate Architecture
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> Oracle is committed to developing practices and products that help 
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>

-- 
Regards, James

<http://www.oracle.com> James Nurthen | Principal Engineer, Accessibility
Phone: +1 650 506 6781 <tel:+1%20650%20506%206781> | Mobile: +1 415 987 
1918 <tel:+1%20415%20987%201918> | Video: james.nurthen@oracle.com 
<sip:james.nurthen@oracle.com>
Oracle Corporate Architecture
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<http://www.oracle.com/commitment> Oracle is committed to developing 
practices and products that help protect the environment