I bought this Shu Uemura IR Medium Blue 675 pressed eye shadow based on the description on Shu's website, calling it an "iridescent denim blue". This is definitely how 675 looks in the pan. As you can see in the swatch, though, this Shu Uemura eye shadow turned out to be much lighter and more of an aqua color. It is iridescent and shimmery, to the point I won't used it with other shimmers or eye shadow with a metallic finish.
It's pretty though, and I like blending a little of this color close to lash line when wearing creamy or satiny nude colors. It gives some extra life and interest. This Shu Uemura blue also works nicely NARS Palladium pencil for a "sea and sun" look. The texture is nice, though probably not the every best Shu has produced (there's some fallout), and a good brush and primer go a long way in making it work.
Bottom Line: I still wish it were more of a denim blue.
Shu Uemura IR Medium Blue 675 Eye Shadow is available at the counters, if you're lucky enough to have one in your country, or from shuuemura-usa.com.