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Re: Contrast Question for 1.4.3

for

From: Karl Brown
Date: Jan 19, 2018 1:19AM


Hi Peter,

For a little further clarity, 14 point at font weight 700 doesn't mean a
developer should go:

.class {
font-size: 14px;
font-weight: 700
}

Pixels don't equal points, as Patrick showed when I asked last year (
https://webaim.org/discussion/mail_thread?thread„18). 14pt bold would
still need to be about 19.2 pixels to use 3:1 contrast ratio and still be
compliant.


On Thu, Jan 18, 2018 at 4:32 PM, Beranek, Nicholas via WebAIM-Forum <
<EMAIL REMOVED> > wrote:

> Hi Peter, we interpret font-weight: bold to equal 700 and, therefore,
> require 14pt 700 for 3 to 1 ratio consideration.
>
> The following link is a reference guide that should help you:
> http://htmldog.com/references/css/properties/font-weight/
>
> Nick Beranek
> Capital One
>
> -----Original Message-----
> From: WebAIM-Forum [mailto: <EMAIL REMOVED> ] On
> Behalf Of Peter Quale
> Sent: Thursday, January 18, 2018 11:27 AM
> To: WebAIM Discussion List < <EMAIL REMOVED> >
> Subject: [WebAIM] Contrast Question for 1.4.3
>
> Apologies if this is covered in the list archives, but I did some
> searching and can find nothing there, nor any concrete information in
> Google searches.
>
> When a style sheet uses relative bold weights like 300, 500, 700, is there
> a good number to assume a "medium bold" font is bold enough to only require
> a 3 to 1 contrast? Of course, many thin fonts will never be bold enough,
> but assuming we're using a typical monospace, solid font. Can one generally
> assume 500 is officially bold and anything less is not bold?
>
> I feel like I read a method of analyzing the area of a font and deciding
> whether the surface of each letter sufficiently stands out from the
> background. But I might have just dreamed that.
>
> Thanks to everyone for their contributions to the list!
>
> -Peter Quale
> >
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> > > > >



--
Karl Brown
Twitter: @kbdevelops
Skype: kbdevelopment

Professional Certificate Web Accessibility Compliance (Distinction),
University of South Australia, 2015