Related to 817198

I'm not aware of a requirement for a specific contrast ratio for the focus ring. I couldn't find it in the WCAG. Please let me know if there is one.

I don't think it's quite so simple to determine whether a focus ring is clear enough. I think the thickness matters too - a thin line with a lot of contrast is similar to a thick line with less contrast, for example. Also, the amount the focused object *changes* when focused is pretty important too.

Good points there. It seems to be especially problematic for me when the item in focus doesn't change in response and/or the focus ring surrounds a similarly colored box. Here's an example:

Focus not on My Account button: https://screenshot.googleplex.com/6WdLG87VpkB.png

Focus on My Account button: https://screenshot.googleplex.com/BYd6ipjkEcR

It's a pretty much imperceptible difference. A nice orange highlight ring like the one on Chrome OS is an example of one I like. 

I'm also bumping this down to p2 since it looks like it could be a false positive here given no WCAG requirement. 

I discussed with dmazzoni@ and the problem here is not the strict ratio of the color of the bounding box to the background but instead the overall delta between focused and unfocused. This requires further UX exploration. Therefore, I'm going to dupe this bug into 819312. That way, the bug will capture the real issue and not the false positive here.