Blackpepper Jay is a matte browned charcoal grey eyeshadow. To my eye it's mostly grey with a hint of brown. I like it in a wash over my lid with some black eyeliner for a simple smoky look, and I also like it with Rouge Bunny Rouge Solstice Halcyon (semi-matte light taupe).
I find it easy to pick up and deposit pigment and easy to blend, so for me it's worth paying the extra for Rouge Bunny Rouge because I find I can have a hard time on both those points with other matte eyeshadows. There are similar shades available in MAC and other brands, but the ease of use (and the fact that Rouge Bunny Rouge eyeshadows don't irritate my dry eyelids) make the premium this brand charges worthwhile for me.
Swatched on my hand.