currentColor seems to get "stuck" in Safari - css

Question

I'm trying to use CSS currentColor as a border-color to generate CSS triangles using :after content. This works great in all browsers I've tried, except one: Safari seems to be caching the currentColor from the first triangle it generates, and then using that everywhere.
Here's what I'm seeing -- expected behavior from Chrome (and Firefox, and IE9+):
Incorrect behavior from Safari 8.0.4 on Yosemite 10.10.2 (same on iOS 8.2) -- notice all three triangles are red, not the currentColor of their elements:
Here's a fiddle with the full code demonstrating the problem.
The relevant CSS:
span {
display: inline-block;
border-bottom: 2px solid currentColor;
}
span::after {
/* Generate a triangle (based on Foundation's css-triangle mixin) */
content:"";
display: inline-block;
width: 0;
height: 0;
border: inset 0.4em;
/* Safari seems to cache this currentColor... */
border-color: currentColor transparent transparent transparent;
border-top-style: solid;
}
.red { color: #c00; }
.blue { color: #009; }
The HTML is simple:
<div>
<span class="red">Red</span>
<span>Default</span>
<span class="blue">Blue</span>
</div>
Is this a bug in Safari? A matter of interpretation on the CSS spec?
More importantly, any suggestions for working around this? I'd hate to have to explicitly declare the color in separate :after rules for each element. (Using currentColor really simplifies maintenance as our other CSS changes.)

Answer 1

So, this turns out to be an actual Safari bug (which might be fixed soon).
I was able to work around it using this suggestion that border-color defaults to currentColor. Replace this:
border-color: currentColor transparent transparent transparent;
with expanded properties that avoid mentioning currentColor:
/* border-top-color: currentColor; is the default behavior */
border-right-color: transparent;
border-bottom-color: transparent;
border-left-color: transparent;
and the problem goes away in Safari (and it still works in the other browsers).

Answer 2

Even I faced a similar issue, so i have to go with a small js trick.
With this trick we can use the currentColor attribute to be set correctly in the desired elements. but it can be achieved only for normal elements. so i moved the pseudo elements into normal elements.
You have to force safari to redraw elements to achieve this. To achieve redrawing elements simply hide and show it.
var nodeStack =[element];
while (node = nodeStack.pop()) {
if (node.nodeType == 1) {
node.style.display="none";
node.style.display="";
var i = node.childNodes.length;
while (i--) {
nodeStack.push(node.childNodes[i]);
}
}
}
Check this simple codepen (Your code with little modification)
and also read this for brief info
Pseudo elements cannot be achieved through this trick. You have to move that into a span or some other element.