We've reviewed colors a few times in this forum, now let's have a look at collars. Hillary Clinton wore a lot of jackets this week, so we'll use her:
First, the Secretary wore hot pink for a statement on Honduras:
We've actually seen her wear this unusual collar shape before, but in red, when she met with the Prime Minister of Singapore. It's a good repeat - this shape works for her by creating some length to the neck with a lower V shape, but adding some structure to the look with the stand up collar around the neck itself.
The following day, she wore red for her remarks on Sudan:
This look is less successful. The high stance of this collar cuts the line of her neck in an unflattering way, and that shape combined with the double rows of buttons make this jacket look like outerwear, even though she's inside. The little bit of necklace peeking out the sides also looks strange, like she made some kind of mistake getting dressed, or again, maybe like she's wearing her coat indoors.
There is something to be said for sticking with what works!