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Re: [css-image] gradients, animations and photosensitive epilepsy

From: Simon Fraser <smfr@me.com>
Date: Fri, 27 May 2011 13:06:58 -0700
Cc: CSS 3 W3C Group <www-style@w3.org>
Message-id: <D608E0E5-8D76-4730-AD69-AF06876E24C0@me.com>
To: Alan Gresley <alan@css-class.com>
On May 27, 2011, at 11:55 AM, Alan Gresley wrote:

> 
> I do believe that the gradient that is seen on this page should never be allow to work.
> 
> http://css-class.com/test/css/3/gradients/repeating-radial-gradients-danger.htm
> 
> 
> Even for an author who may have worked with some gradients, the results of using such small distances between color stops could cause someone with photosensitive epilepsy [1] to have a seizure without warning. I myself find it hard to scroll this gradient.
> 
> I do suggest that the CSS WG get feedback from several people who are qualified in the field of photosensitive epilepsy regarding certain gradients and animations.
> 
> I myself have always been careful in the use of color with my test and demos. I do avoid using large segments of red, yellow or fuchsia as background colors. This is since my wife has a form of photosensitive epilepsy. I will be changing some of my own animations (increasing transparency). One has already been changed.

Although I'm sympathetic to accessibility issues like this, imposing restrictions on gradients specifically seems arbitrary. What's to stop a page author from using an image with the same appearance?

Simon
Received on Friday, 27 May 2011 20:07:40 GMT

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