Re: Colour contrast algorithm when black is used

Could be...

for a 2.1 we're probably not going to solve it all, unless we're super
lucky... I'm thinking about a minor tweak from what we know now that would
have broad appeal and plug significant holes.

So if there's a simple amendment in a colour space, that would be
awesome... I'll be interested in Jared's suggestions.

Cheers,
David MacDonald



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On Sun, Aug 20, 2017 at 1:10 PM, Patrick H. Lauke <redux@splintered.co.uk>
wrote:

> On 20/08/2017 11:41, David MacDonald wrote:
>
>> There recently was a Twitter discussion about colour contrast
>> combinations.
>>
>> https://twitter.com/davidmacd/status/899215930445754368
>>
>> There seems to be consensus from stakeholders that when black #000000 is
>> contrasted against some colours, the 4.5 threshold is met even when it's
>> hard to see. I've noticed this for years, and it seems others have too, but
>> the Twitter discussion got me thinking about it again.
>>
>> Black against #777777 passes, and black against dark orange passes, but
>> to the eye, white #FFFFFF which fails, seems much more readable against
>> this grey  or against this orange.
>>
>> There is something about black #000000 which needs a little tweak in the
>> algorithm.
>>
>> Perhaps when black is against colour spectrum X, it requires a higher
>> contrast minimum?
>>
>
> Are you sure it's literally *just* full #000000 black? What about #000001?
> My point being that it's perhaps not just about that one particular color,
> but more about a particular part of the spectrum / the color space used?
>
> P
> --
> Patrick H. Lauke
>
> www.splintered.co.uk | https://github.com/patrickhlauke
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>
>