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Re: CFC Add User Interface Component Contrast (Minimum) to Editors Draft

From: Jim Allan <jimallan@tsbvi.edu>
Date: Tue, 20 Jun 2017 15:35:54 -0500
Message-ID: <CA+=z1WnDveKzYU2teVEtEu-rkOuCzgsSef_FAa9YsX1q+nH_tA@mail.gmail.com>
To: Joshue O Connor <josh@interaccess.ie>
Cc: WCAG <w3c-wai-gl@w3.org>
+1


On Tue, Jun 20, 2017 at 1:52 PM, Joshue O Connor <josh@interaccess.ie>
wrote:

> Hi all,
>
> I placed older SC text into the CFC - The current SC text for this one is:
> [1]
>
> Essential
> <https://rawgit.com/w3c/wcag21/user-interface-component-contrast-minimum_ISSUE-10/guidelines/index.html#dfn-essential>
>  visual identifiers of user interface components
> <https://rawgit.com/w3c/wcag21/user-interface-component-contrast-minimum_ISSUE-10/guidelines/index.html#dfn-user-interface-component>
>  have a contrast ratio
> <https://rawgit.com/w3c/wcag21/user-interface-component-contrast-minimum_ISSUE-10/guidelines/index.html#dfn-contrast-ratio>
>  of at least 4.5:1 against the immediate surrounding color(s), except for
> the following situations:
>
>    - *Thicker:* A contrast ratio
>    <https://rawgit.com/w3c/wcag21/user-interface-component-contrast-minimum_ISSUE-10/guidelines/index.html#dfn-contrast-ratio>
>     of at least 3:1 is required where the minimum width and height are at
>    least 3 CSS pixels
>    <https://rawgit.com/w3c/wcag21/user-interface-component-contrast-minimum_ISSUE-10/guidelines/index.html#dfn-css-pixel>,
>    for the essential
>    <https://rawgit.com/w3c/wcag21/user-interface-component-contrast-minimum_ISSUE-10/guidelines/index.html#dfn-essential>
>     visual identifier.
>    - *Inactive:* Disabled or otherwise inactive user interface components
>    <https://rawgit.com/w3c/wcag21/user-interface-component-contrast-minimum_ISSUE-10/guidelines/index.html#dfn-user-interface-component>
>    - *User agent control:* The color(s) of the user interface component
>    and any adjacent color(s) are determined by the user agent and are not
>    modified by the author.
>
> Notes§
> <https://rawgit.com/w3c/wcag21/user-interface-component-contrast-minimum_ISSUE-10/guidelines/index.html#user-interface-component-contrast-minimum>
>
>    - Examples of essential
>    <https://rawgit.com/w3c/wcag21/user-interface-component-contrast-minimum_ISSUE-10/guidelines/index.html#dfn-essential>
>     visual indicators of user interface components
>    <https://rawgit.com/w3c/wcag21/user-interface-component-contrast-minimum_ISSUE-10/guidelines/index.html#dfn-user-interface-component>
>     may include (a border, edge, or icon), current value (such as
>    non-text visual indication of aria-valuenow on a slider) and current state
>    (such as selection indicator, focus indicator) or other essential visual
>    indication (which do not rely on color alone).
>    - Under consideration: simplify this Success Criterion by setting the
>    minimum color contrast requirement to 3:1 and removing any need for
>    measuring thickness.
>    - Under consideration: will review to see if it is possible to combine
>    with proposed WCAG 2.1 SC 1.4.11 Graphics Contrast.
>
>
> Thanks
>
> Josh
>
> [1] https://rawgit.com/w3c/wcag21/user-interface-component-
> contrast-minimum_ISSUE-10/guidelines/index.html#user-
> interface-component-contrast-minimum
>
>
>
>
> Joshue O Connor wrote:
>
> Call For Consensus — ends Friday June 23rd at 1:00pm Boston time.
>
> The Working Group has reviewed and approved a Success Criterion for
> inclusion in the Editor’s Draft: "User Interface Component Contrast
> (Minimum)" with the goal of obtaining additional input external to the
> working group.
>
> SC TEXT:
>
> User Interface Component Contrast (Minimum)*:*
>
> Essential visual identifiers of user interface components have a contrast
> ratio of at least 4.5:1 against the immediate surrounding color(s), except
> for the following situations:
>
>    1. *Thicker:* A contrast ratio of at least 3:1 is required where the
>    minimum width and height are at least 3 CSS pixels, for the essential
>    visual identifier.
>    2. *Inactive:* Disabled or otherwise inactive user interface
>    components are exempt from this requirement.
>    3. *User agent control:* The color(s) of the user interface component
>    and any adjacent color(s) are determined by the user agent and are not
>    modified by the author.
>
> Survey results:
> https://www.w3.org/2002/09/wbs/35422/March14SCReviews/results#xq9
> GIT Hub: https://github.com/w3c/wcag21/issues/10
>
> The new SC can be reviewed here, in the context of the full draft:
>
> https://rawgit.com/w3c/wcag21/user-interface-component-
> contrast-minimum_ISSUE-10/guidelines/index.html#user-
> interface-component-contrast-minimum
>
> If you have concerns about this proposed consensus position that have not
> been discussed already and feel that those concerns result in you “not
> being able to live with” this decision, please let the group know before
> the CfC deadline.
>
> Thanks
> --
> Joshue O Connor
> Director | InterAccess.ie
>
>
> --
> Joshue O Connor
> Director | InterAccess.ie
>



-- 
Jim Allan, Accessibility Coordinator
Texas School for the Blind and Visually Impaired
1100 W. 45th St., Austin, Texas 78756
voice 512.206.9315    fax: 512.206.9264  http://www.tsbvi.edu/
"We shape our tools and thereafter our tools shape us." McLuhan, 1964
Received on Tuesday, 20 June 2017 20:36:28 UTC

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