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RE: Proposed wordsmithing for Contrast (Minimum) on interactive elements

From: Katie Haritos-Shea GMAIL <ryladog@gmail.com>
Date: Fri, 11 Nov 2016 13:11:05 -0500
To: "'Glenda Sims'" <glenda.sims@deque.com>, "'public-low-vision-a11y-tf'" <public-low-vision-a11y-tf@w3.org>
Message-ID: <04c301d23c46$f88049a0$e980dce0$@gmail.com>
Folks,

 

This is be relevant to this as well as other SC about text, but does this take into account a scrolling background, as in a SPA (single page application)?

 

​​​​​

 

 

 

* katie *

 

Katie Haritos-Shea 
Principal ICT Accessibility Architect (WCAG/Section 508/ADA/AODA)

 

Cell: 703-371-5545 |  <mailto:ryladog@gmail.com> ryladog@gmail.com | Oakton, VA |  <http://www.linkedin.com/in/katieharitosshea/> LinkedIn Profile | Office: 703-371-5545 |  <https://twitter.com/Ryladog> @ryladog

 

From: Glenda Sims [mailto:glenda.sims@deque.com] 
Sent: Friday, November 11, 2016 9:49 AM
To: public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org>
Subject: Proposed wordsmithing for Contrast (Minimum) on interactive elements

 

Oh wonderful LVTF,

 

David MacDonald and Alastair Campbell have closely reviewed the proposed WCAG SC for Interactive Element Contrast (Minimum) at https://www.w3.org/WAI/GL/low-vision-a11y-tf/wiki/Contrast_(Minimum)

 

And I think they have made a fabulous suggestion for rewording, that makes it easier to read (and understand) this proposed SC, while simulatenously maintaing all the of the meaning and intent.  

 

The current (long winded) wording is:

 

1.   The visual presentation of important (non-text) information in an interactive image has a contrast ratio of at least 4.5:1 against the immediate surrounding background.

2.   The visual presentation of a disabled interactive element has a contrast ratio of at least 3:1 against the immediate surrounding background.

3.   The visual presentation of input elements or the border(s) of input elements has a contrast ratio of at least 4.5:1 against the immediate surrounding background, except for the following:

*         Medium Width Border for Input Elements: A medium width border (or wider) for input elements has a contrast ratio of at least 3:1 against the immediate surrounding background;

4.   The visual presentation of focus indicators and selected indicators has a contrast ratio of at least 4.5:1 against the immediate surrounding background, except for the following:

*         Medium Focus Indicator: Medium focus indicator has a contrast ratio of at least 3:1 against the immediate surrounding background;

*         Medium Selected Indicator: Medium selected indicator has a contrast ratio of at least 3:1 against the immediate surrounding background;.

*         Focus Indicator for an interactive logo image: Focus indicator for an interactive logo image has a contrast ratio of at least 3:1 against the immediate surrounding background.

The rewording proposed by David MacDonald & Alastair Campbell is:

 

A mechanism is available to ensure the visual presentation of the following have a contrast ratio of at least 4.5:1 against the immediate surrounding background :

*	important (non-text) information in an interactive image;
*	input elements or the border(s) of input elements;
*	focus and select indicators; 

except for the following which have a contrast ratio of at least 3:1.

*	disabled interactive elements;
*	thicker lines: where the minimum width of the line is at least 3px;
*	focus Indicators for an interactive logo image;

I'm in 100% favor of changing the wording to what David/Alastair have proposed.  But before I do that, I wanted to give y'all a chance to give me feedback.  If you are in favor of this change, can you respond with +1?  If you are opposed...can you respond with a -1 and help us understand what you think would be better?

 

Thanks much,

G

 

P.S.  I'll hold off on making this change on the wiki until Monday Nov 14th at noon central time.
Received on Friday, 11 November 2016 18:11:39 UTC

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