Fwd: A color tutorial from Tom Jewett

this is fabulous.

---------- Forwarded message ---------
From: Wayne Dick <wayneedick@gmail.com>
Date: Fri, May 10, 2019 at 1:56 PM
Subject: Re: A color tutorial from Tom Jewett
To: GLWAI Guidelines WG org <w3c-wai-gl@w3.org>, Tom Jewett <
tom@knowbility.org>


As usual, I forgot the URL for Tom's tutorial.
http://colortutorial.design/index.html
Best, Wayne

On Fri, May 10, 2019 at 11:51 AM Wayne Dick <wayneedick@gmail.com> wrote:

> Hi All,
> For those interested in the color / contrast discussion Tom has developed
> a nice introduction to the state of things right now.
>
> It is easy to follow and correct. It gives you some nice tools to see
> things.
>
> Tom and I think the concepts of luminance and contrast need review. Here
> are some issues we need to understand.
> 1. Is RGB as measured on current devices meaningful in terms of sRGB?
> 2. Are we using correct formulas for luminance and contrast.
> 3. Has the IEEE taken any recent steps to clarify how to compute cross
> platform computations of luminance?
> 4. How do our members like Adobe address cross platform color issues, and
> can this be applied in a reasonable way to computing contrast for
> accessibility?
>
> Whatever formulation we ultimately choose we can always write a converter
> our key points remain constant like 4.5:1.
>
> Well read, watch and enjoy,
> Best, Wayne
>
>
>
>
>
>

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