Re: Icon Fonts and contrast

Hi

No - it has to do with the nature of contrast.

Since you need to have a minimum contrast ratio of 4.5:1 -  

Color A has to be very close to white 
Color B can be almost any hue, but with a relative luminance value in a narrow range in the middle, and 
Color C has to be very close to black.

There just isn't any room to get another color in there.


Think of mounting three shelves above each other on a wall in a room with an 11 foot ceiling -

If you needed a minimum of 5 feet between your shelves, you have some limited options on where to put the bottom, top, and middle shelves but you can’t have more than three.


(Contrast isn't linear so 4.5:1 is very near the middle of the contrast range.)


gregg

> On Feb 23, 2016, at 7:29 AM, Jonathan Avila <jon.avila@ssbbartgroup.com> wrote:
> 
> [Gregg wrote in another thread related to WCAG extensions] can’t extend this to ICONS unless you very carefully define icon icon art and figure out how to handle the fact that you can only have one color other than black and white and still have everything contrast with everything else.  Mathematically impossible.   You can try it.
>  
> Gregg, I am interested in your thoughts on why there is only one additional color available other than black or white – is this because the icons may be actionable?  I understand there are limitations in link text with different types of links such as visited, non-visited, etc. without other decoration -- is it a similar issue?
>  
> Jonathan