I'm almost through swatching nars blushes!! I believe Orgasm is the last one. Nars describes Mata Hari as a "Rose Petal Pink," and it's also the only matte Nars blush I own!
On my skin Mata Hari comes across as a dusty mauvey pink. I really like this tone of pink because it's not too bright, nor too cool toned. I find it to be very wearable!
The pigmentation is wonderful but when I first bought it I was having a lot of trouble applying. It just came across way too heavy. Then I discovered the skunk brush! Take a mac 187 type of brush to apply it and you get perfectly flushed rosey cheeks. This is definitely a blush I like to pair with purple or blue eyeshadow looks because of the mauve/plummy undertone.
The quality is on par with all the other Nars blushes I've babbled about: it lasts all day on my cheeks, blendable, and VERY pigmented!