Since version 1.40 pdfTeX supports color stacks. The driver file `pdftex.def for package `color' defines and uses a main color stack since version v0.04b.

This package is intended for package writers. It defines macros for setting and maintaining new color stacks.

The package is part of the oberdiek bundle.

The author is Heiko Oberdiek. The package is Copyright © 2007 Heiko Oberdiek.