This set of brand new (purchased in February 2018) Crate & Barrel white ceramic dishes (made in Indonesia) were non-detect for lead (Pb), arsenic (As), cadmium (Cd), and mercury (Hg) when tested with an XRF instrument.
This set readings is true for all components and all sides (inside and out, back and front) including the black back mark/logo.
In previous years of Crate & Barrel dishes the black back mark is often positive for lead even when the rest of the dish is lead-free. Usually you can feel raised lettering on the back marks that are positive for lead, whereas the lettering on the back marks of the dishes pictured here is not raised/cannot be felt as a rough surface with your finger tip and is under the surface glossy glaze.
As always, please let me know if you have any questions!