The blue shimmer is more subtle than I'd hoped it would be, though it seemed a little more visible on the foal.
All in all, I'm glad I got this set - they'll go well with my other Hansels and Gretels (once I get them unpacked and put back on the shelf).
Here's a last pic of Rory and the almost-identical foal from this year's Heroes of the West set:
They're really, really similar to each other - you can see the blue shimmer on Rory here (and his socks are masked, he has two more socks than the other foal does, and his blaze/star is a little smaller), so I wish Breyer had done a little more to differentiate the two. I suspect from the Heroes of the West foal's gray tail tip that he's intended to actually be gray and would lighten with time, but in the meantime, I wish Rory had a bald face or a high stocking or something to set him off a little more - except then he'd look a lot like Tuari, from the 2015 America's Wild Mustangs set. I think Breyer may have painted themselves into a corner here?
Another solution to set them apart would have been to make Fiona and Rory glossy - that would have been awesome! Either way, I think it's probably safe to say Hansel won't be issued in black again anytime soon.