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Re[2]: Colour Luminosity/Contrast for form inputs/controls/components

From: <josh@interaccess.ie>
Date: Wed, 02 Nov 2016 09:53:02 +0000
To: "Chakravarthula, Srinivasu" <srchakravarthula@informatica.com>, WCAG <w3c-wai-gl@w3.org>
Message-Id: <em86241eb9-292e-41d5-9643-2000543a13b4@josh_machine>
Hi Srinivasu,

No, I do think we need a better bar/clearer guidance here.
The closest I can find it G183: Using a contrast ratio of 3:1 with 
surrounding text and providing additional visual cues on focus for links 
or controls where color alone is used to identify them [1]

This could arguably cover a situation where there is a custom radio 
button that needs to be selected. However, the luminosity ration seems 
low to me.

Also I don't feel that the SCs are clear on the importance of having 
good colour luminosity for UI components.

So this may be something that the LVTF is looking at already but I want 
to see what the group feels about this so thanks for the feedback.

Josh

[1] https://www.w3.org/TR/2016/NOTE-WCAG20-TECHS-20161007/G183

------ Original Message ------
From: "Chakravarthula, Srinivasu" <srchakravarthula@informatica.com>
To: "josh@interaccess.ie" <josh@interaccess.ie>; "WCAG" 
<w3c-wai-gl@w3.org>
Sent: 02/11/2016 09:41:01
Subject: RE: Colour Luminosity/Contrast for form 
inputs/controls/components

>Hello Josh,
>
>While that would be helpful, causes a bit of problem to WG too if we 
>are more directive.
>
>
>
>I think wording something like “contrast ratio between foreground and 
>background” would say it all and applicable to text, UI components 
>etc.,
>
>
>
>Reason I’m saying it technology keeps changing every day and we cannot 
>really predict what would come tomorrow.
>
>
>
>Makes sense?
>
>
>
>Best regards,
>
>-Vasu
>
>--
>
>Srinivasu Chakravarthula
>
>Lead Accessibility Consultant
>
>InformaticaBusiness Solutions Pvt Ltd.,
>
>Work: +91-80-4020-3760 | Cell: +91 99008 10881
>
>Website | Accessibility Blog | LinkedIn | Twitter
>
>
>
>From:josh@interaccess.ie [mailto:josh@interaccess.ie]
>Sent: Wednesday, November 02, 2016 3:07 PM
>To: WCAG <w3c-wai-gl@w3.org>
>Subject: Colour Luminosity/Contrast for form inputs/controls/components
>
>
>
>I'm looking at contrast requirements for a client regarding form 
>controls, radio buttons etc for a client, and WCAG does not seem to 
>specify them. It seems 'implied' that 1.4.3 is relevant and there are 
>techniques that touch on the subject (G183, G182, G111) but nothing 
>definitive like.
>
>
>
>"If you have an UI component/input control, or radio button that a VIP 
>user needs to see to select/interact with the luminosity requirements 
>are x."
>
>
>
>Am I missing something? Or is this something we need to address?
>
>
>
>Thanks
>
>
>
>Josh
>
Received on Wednesday, 2 November 2016 09:50:21 UTC

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