Fluidline

Mac Fluidline
Ultra-smooth, Fluidline’s gel formula provides the precision of a liquid liner with a silkier, softer finish. Goes on “foolproof” with a brush in an easy dip-and-stroke action.

I've got the blacktrack one and it's a shade of solid flat black. An angled eyeliner brush is required. Great for shakey hands like mine. Thinking of getting another color.