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Re: CfC: Issue 200

From: Patrick H. Lauke <redux@splintered.co.uk>
Date: Wed, 26 Oct 2016 14:20:14 +0100
To: w3c-wai-gl@w3.org
Message-ID: <519b2923-222d-576f-3fd2-3ef32fadaa98@splintered.co.uk>
On 26/10/2016 14:04, Jonathan Avila wrote:
> Ø  Has anyone confirmed that the tools used to get these contrast ratios
> do or do not round up without us knowing?
> This is something I have made a note to check on internally.  I’d assume
> this will be something that needs to be evaluated on  a tool by tool
> basis and may need a tweak.  My guess is that most tools use two
> significant digits and allow rounding after that.

I know for a fact that the TPG Colour Contrast Analyser does rounding to 
1 decimal point. I have opened issues in GitHub for our developers to 
harmonize the approach based on this thread/discussion. I would suggest, 
as Jonathan said, that this needs to be evaluated on a per-tool basis 
(and bugs/issues filed against tools to make sure they follow this 
latest understanding about threshold minimum values and not to round 
values *before* comparing them to the threshold)

Patrick H. Lauke

www.splintered.co.uk | https://github.com/patrickhlauke
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Received on Wednesday, 26 October 2016 13:20:42 UTC

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