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Re: color contrast on 60pt logo letters

for

From: Jonathan Metz
Date: Apr 2, 2013 2:41PM


I third Jared and James (and now Cliff), though I agree with Bryan that the SSB Bart Group contrast checker is pretty awesome.

To expand on Cliff's point - if you want to see what it looks like to other people, but can't find any - you might consider installing color oracle (http://www.colororacle.org). It'll at least give you an idea of what it might look like to someone who is color blind.

Jonathan Metz

From: Cliff Tyllick < <EMAIL REMOVED> <mailto: <EMAIL REMOVED> >>
Reply-To: Cliff Tyllick < <EMAIL REMOVED> <mailto: <EMAIL REMOVED> >>, WebAIM Discussion List < <EMAIL REMOVED> <mailto: <EMAIL REMOVED> >>
Date: Friday, March 29, 2013 11:50 AM
To: WebAIM Discussion List < <EMAIL REMOVED> <mailto: <EMAIL REMOVED> >>
Subject: Re: [WebAIM] color contrast on 60pt logo letters

Angela, I agree with both Jared and James: First, use your best judgment; ultimately, realize that logos are exempt.

As for usability, folks who need larger text typically also need lower contrast—a white background becomes a harsh glare when viewed closely—so it's likely that if you can see it comfortably but are bit worried about low contrast it is just fine for that group.

With no hard and fast answers, perhaps you could find a few colleagues, customers, or even neighbors whose vision isn't as good as yours and see if it works for them. If it works for people who typically increase the contrast before they try to expand the size of the displayed content, then you have a real-world answer to your question.

And that's a better answer than any mathematical formula can give you.

Cliff Tyllick
AT&T Corporate Accessibility Technology Office



From: Angela French < <EMAIL REMOVED> <mailto: <EMAIL REMOVED> >>
To: WebAIM Discussion List < <EMAIL REMOVED> <mailto: <EMAIL REMOVED> >>
Sent: Friday, March 29, 2013 10:30 AM
Subject: Re: [WebAIM] color contrast on 60pt logo letters


-----Original Message-----
From: <EMAIL REMOVED> <mailto: <EMAIL REMOVED> > [mailto:webaim-forum-
<EMAIL REMOVED> <mailto: <EMAIL REMOVED> >] On Behalf Of James Nurthen
Sent: Friday, March 29, 2013 8:05 AM
To: WebAIM Discussion List
Subject: Re: [WebAIM] color contrast on 60pt logo letters

On Thu, Mar 28, 2013 at 3:33 PM, Jared Smith < <EMAIL REMOVED> <mailto: <EMAIL REMOVED> >> wrote:

On Thu, Mar 28, 2013 at 4:15 PM, Angela French < <EMAIL REMOVED> <mailto: <EMAIL REMOVED> >>
wrote:
> Does anyone know of a checker I might use that would take into
> account
such large letters?

I think the best one is between your ears. A quick glance and a bit of
common sense should readily indicate if the logo has sufficient
contrast or not.

If you're concerned with WCAG conformance, they treat all large text
the same, and in this case the colors would not meet the minimal
threshold for AAA. So you can either adjust the colors to meet the
threshold, or if it looks like it it has sufficient contrast, just
leave it and move on to more important matters.


Strictly speaking if you are concerned only with WCAG conformance then
logos meet WCAG whatever the contrast level as they have an exemption
within both 1.4.3 and 1.4.6

Regards,
James

My concern actually is that it is usable. I think it is, but then again I see pretty well - at least the big stuff like this.