A spot color is one that is printed with its own ink. 
Typically, printers use spot colors in the production 
of books or other printed material. The spotcolor package
by Jens Elstner is a first attempt to introduce the use of 
spot colors with pdfLaTeX. The xespotcolor package is a 
reimplementation of this package so to be usable with 
XeLaTeX or LaTeX+dvipdfmx. As such, it has the same user 
interface and  the same capabilities. The recent version 
of xdvipdfm-x (svn revision 36553 and later) should be
used to run the tests.
Apostolos Syropoulos
2015/03/22
