MAC Waveline Fluidline ($15.00 for 0.10 oz.) is a permanent product (and has been for awhile) that is getting repromoted in the new Love & Water Collection. MAC describes this shade as a “navy blue with low level gold pearl.” It’s a rich navy blue with just a touch of purple–it’s barely there but with the right combination of colors could be pulled out. It has good opacity in a single pass and is easily built up in color. MAC Prussian is similar, though perhaps a little more noticebly purple.