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

From: Alastair Campbell <acampbell@nomensa.com>
Date: Wed, 21 Jun 2017 08:25:49 +0000
To: WCAG <w3c-wai-gl@w3.org>
Message-ID: <A2220C60-B1C8-4169-9B5A-45E3F858B390@nomensa.com>

From: Joshue O Connor

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.
·         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.



[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.


Received on Wednesday, 21 June 2017 08:26:25 UTC

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