Don't know how I managed to overlook this colour - this is not a new colour - but one of the older ones. Simply Berry is a dark transparent amethyst - with a bit more "oomph" than the Effetre Med. Transparent Purple.
Here we have, Simply Berry on the left, and Eff Med Transp Purple (042) on the right. In real life - the Simply Berry looks more saturated in colour, and less like "just really dark."
A nice, intense red-purple - holds up well when used thin.