Re: A test for Color. Please comment.

Thanks James.
Yes I thought of limiting this to HTML elements that contain text, and I
have compiling the list. Then the queries could go

e1, e2, ..., en {rules}

I wanted to get a block concept out before I proceeded.

Wayne



On Fri, Mar 31, 2017 at 12:17 PM, James Nurthen <james.nurthen@oracle.com>
wrote:

> You need to change the last 2 to only be testing text. We would not expect
> images to change color based on this.
>
> (note – I haven’t thought about the rest of it enough to comment either
> way)
>
> Does the color of text and its background change?
>
> Does some text keep its original color?
>
>
>
>
>
> *From:* Wayne Dick [mailto:wayneedick@gmail.com]
> *Sent:* Friday, March 31, 2017 12:03 PM
> *To:* public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org>; GLWAI
> Guidelines WG org <w3c-wai-gl@w3.org>; Wayne E Dick <
> waynedick@knowbility.org>
> *Subject:* A test for Color. Please comment.
>
>
>
> This is a start. Note this is not user facing, this is a test for authors
> and accessibility authors.
>
>
> This is a test for authors:
>
> 1.  Pick a set S1 of 3 random integers between 16 and 48
>
> 2.  Pick a set S2 of 3 random integers between 182 and 218
>
> 3.  From these sets choose 2 pairs as follows:
>
> 4.  Pair 1 = (c, b) where c = (c1, c2, c3) is chosen from the first set S1
> and b = (b1, b2, b3) is chosen from the second set S2. (dark on light)
>
> 5.  Pair 2 = (c, b) where c = (c1, c2, c3) is chosen from the second set
> S2 and b = (b1, b2, b3) is chosen from the first set S1. (light on dark)
>
> 6.  Insert the following statement as the last element in the head element:
>
> <style>
>
>  body, body * {
>
> color: rgb (c1, c2, c3);
>
> background-color: rgb(b1, b2, b3);
>
> }
>
> *:hover, *:focus, mark {
>
> color: rgb(b1,b2,b3);
>
> background-color: rgb(c1,c2,c3)
> <style>
>
> 7.  Reverse the roles of (c1, c2, c3) and (b1, b2, b3)
>
> The test for accessibility auditors is the same. It can be done using the
> same change in code inspectors.
>
>
>
> Notes: One can start without !important to flesh out embedded style. Do it
> with !important to see if this is overridden.
>
>
>
> What to see:
>
> Does any essential content disappear? That is a failure.
>
> Do colors change?
>
> Do some colors keep their original?
>
>
>
> If original colors persist, remove background images.
>
>
>
> Does any essential content disappear? That is a failure.
>
> Do colors change?
>
> Do some colors keep their original?
>
>
>
> If in these steps any answer is no, the SC fails.
>
>
>
>
>
>
>