From what I can tell, Next To Skin is the most perfect contour shade for NC/NW20 and lighter. It is so natural, the shade name is just on point.
Try telling me Benefit Hoola is such a great, natural shade for contouring ever again. That stuff is straight up orange.
Next to Skin is going to fit every undertone, not just someone pink or yellow (I'm an NC20 and I can't wear NARS Contour Blush in Olympia, it is so pink in tone, it makes me look sick). It is neutral and that is the great thing about this blush.
It looks very pale and gray in the pan though, don't let that fool you.
I'm not sure why some people lighter than NC/NW20 have problems with it showing up. I'd recommend reading Temptalia's review, she is absolutely right.
I swatched Next To Skin and Taupe on my hand after applying a layer of MAC Pro Longwear Foundation in NC20 first. I tried making this test as scientific as possible
Both blushes were applied using a Real Techniques Deluxe Crease Brush, just because I wanted them to appear as vibrant as possible.
Taupe is on the left, Next To Skin on the right
Backup worthy!