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Re: Finding a real background color of an element

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On 23/08/2018 13:54, Julio Di Egidio wrote:
> On Thursday, 23 August 2018 07:52:23 UTC+2, Cezary Tomczyk  wrote:
>> On 22/08/2018 20:37, Julio Di Egidio wrote:
>>> On Wednesday, 22 August 2018 19:01:56 UTC+2, Cezary Tomczyk  wrote:
>>>
>>>> That means to me that there is no reliable way to get a real background
>>>> color of the HTML element. :/
>>>
>>> Well, if you have control over it, do set a color and background color on
>>> the body, that's required for accessibility anyway.  When there is no such
>>> information and one needs it, rather review your approach and expectations.
>>
>> The background and foreground color should be defined for the body, but
>> mostly is not defined. In reality, I mean.
> 
> Sometimes accessibility really doesn't matter (but then one would not lint for
> accessibility anyway).  In all other cases, I'd say no competent web programmer
> can make that mistake: in our toolbox there is a minimal style just as there is
> a minimal html...

Yes, I share these thoughts "minimal style just as there is a minimal 
html...".

>>> What is it that you are trying to build?  Theming?  A self-styling widget?
>>> Otherwise what?  There are solutions to every well-posed problem, as well as
>>> there are ill-posed problems or solutions for no problem at all...
>>
>> I do calculate a contrast ratio and for that purpose I need background
>> and foreground color. Currently, if I can't determine a background color
>> for a particular element then I do skip contrast ratio calculation.
> 
> I'd expect an accessibility linter to rather report it as a most basic and
> most serious violation.

Unfortunately none of known to me are reporting it.

>> I am working on https://www.aslint.org/. The code is not public yet, but
>> I have a plan to publish it.
> 
> Not an easy one: accessibility requirements for a significant part rely on
> subjective evaluation.  So, it will be interesting to see what you come up
> with...  :)

I think I'll include that case in the report to draw the attention. I 
think developers should be aware that if background can not be 
explicitly determined then they should fix it. :-)

-- 
Cezary Tomczyk
http://www.ctomczyk.pl/

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Finding a real background color of an element Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2018-08-21 19:40 +0200
  Re: Finding a real background color of an element "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2018-08-21 21:14 -0700
  Re: Finding a real background color of an element JJ <jj4public@vfemail.net> - 2018-08-22 14:32 +0700
    Re: Finding a real background color of an element Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2018-08-22 19:01 +0200
      Re: Finding a real background color of an element Julio Di Egidio <julio@diegidio.name> - 2018-08-22 11:37 -0700
        Re: Finding a real background color of an element Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2018-08-23 07:52 +0200
          Re: Finding a real background color of an element Julio Di Egidio <julio@diegidio.name> - 2018-08-23 04:54 -0700
            Re: Finding a real background color of an element Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2018-08-24 19:09 +0200
              Re: Finding a real background color of an element Julio Di Egidio <julio@diegidio.name> - 2018-09-03 03:55 -0700
                Re: Finding a real background color of an element Julio Di Egidio <julio@diegidio.name> - 2018-09-03 04:28 -0700
                Re: Finding a real background color of an element Julio Di Egidio <julio@diegidio.name> - 2018-09-03 05:09 -0700
          Re: Finding a real background color of an element "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2018-09-02 12:40 -0700
            Re: Finding a real background color of an element Julio Di Egidio <julio@diegidio.name> - 2018-09-03 03:51 -0700
              Re: Finding a real background color of an element Julio Di Egidio <julio@diegidio.name> - 2018-09-03 03:55 -0700
            Re: Finding a real background color of an element Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2018-09-04 18:52 +0200
  Re: Finding a real background color of an element Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-08-29 22:12 +0200
    Re: Finding a real background color of an element Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2018-08-31 22:30 +0200
      Re: Finding a real background color of an element Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-09-02 05:09 +0200
        Re: Finding a real background color of an element Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2018-09-02 19:57 +0200
          Re: Finding a real background color of an element Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-09-03 15:09 +0200
            Re: Finding a real background color of an element Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2018-09-04 19:02 +0200
              Re: Finding a real background color of an element Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-09-04 22:15 +0200
                Re: Finding a real background color of an element Julio Di Egidio <julio@diegidio.name> - 2018-09-04 22:48 -0700
                Re: Finding a real background color of an element Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-09-08 15:39 +0200
                Re: Finding a real background color of an element Julio Di Egidio <julio@diegidio.name> - 2018-09-08 06:57 -0700
                Re: Finding a real background color of an element Richard Damon <Richard@Damon-Family.org> - 2018-09-08 13:32 -0400
                Re: Finding a real background color of an element Julio Di Egidio <julio@diegidio.name> - 2018-09-08 10:43 -0700
                Re: Finding a real background color of an element Julio Di Egidio <julio@diegidio.name> - 2018-09-08 10:44 -0700
                Re: Finding a real background color of an element Richard Damon <Richard@Damon-Family.org> - 2018-09-08 14:23 -0400
                Re: Finding a real background color of an element Julio Di Egidio <julio@diegidio.name> - 2018-09-08 11:31 -0700
                Re: Finding a real background color of an element Richard Damon <Richard@Damon-Family.org> - 2018-09-08 17:59 -0400
  Re: Finding a real background color of an element Silvio <silvio@internet.com> - 2018-09-04 22:05 +0200

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