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

+1

Steve

From: Joshue O Connor [mailto:josh@interaccess.ie]
Sent: Tuesday, June 20, 2017 2:53 PM
To: WCAG <w3c-wai-gl@w3.org>
Subject: Re: CFC Add User Interface Component Contrast (Minimum) to Editors Draft

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