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+Package `xcolor' by Dr. Uwe Kern
+(xcolor at ukern dot de)
+
+History
+=======
+
+2016/05/11 v2.12
+* New features:
+ - \nopagecolor command as introduced in `color' v1.1a
+ (example added to xcolor3.tex);
+ - `luatex' driver option (code provided by DPC) to fix
+ incompatibilities due to changes in new LuaTeX version.
+* Bugfixes:
+ - possible name conflict by \XC@ifxcase call;
+ - incorrect internal \@hex@@Hex macro.
+
+2007/01/21 v2.11
+* New features:
+ - color names `lime' and `teal' added to the set of predefined
+ colors.
+* Bugfix:
+ - incorrect \XC@strip@comma call within `hyperref'-related options.
+
+2006/11/28 v2.10
+* New features:
+ - `fixinclude' option prevents dvips from explicitly resetting
+ current color to `black' before actually inserting an .eps file
+ via \color{red}\includegraphics{foo}.
+* Changes:
+ - \colorbox and \fcolorbox made robust;
+ - obsolete package option `pst' removed;
+ - several changes to internal macros.
+* Bugfixes:
+ - incorrect processing of cmyk-type current color `.'.
+
+2005/12/21 v2.09
+* New features:
+ - \definecolor and \color now accept space-separated color
+ specifications, e.g., \color[rgb]{1 .5 0};
+ - experimental `xcdraw' option extended to `pdftex' and `dvipdfm'
+ drivers.
+* Changes:
+ - test file xcolor2.tex made compatible with recent changes in
+ `pstricks';
+ - test file xcolor3.tex extended;
+ - driver test file xcolor4.tex extended to demonstrate the different
+ frame drawing approaches;
+ - more efficient implementation of driver-specific code.
+
+2005/11/25 v2.08
+* New features:
+ - more flexibility for \fcolorbox arguments, e.g.,
+ \fcolorbox[gray]{0.5}[wave]{580}{test};
+ - \boxframe returns a frame of given dimensions;
+ - new implementation of \f(rame)box and \fcolorbox as an extension
+ of bug report latex/3655 to reduce pixel positioning errors in
+ output devices;
+ - `kernelfbox' option for those who prefer the previous \f(rame)box
+ approach;
+ - experimental `xcdraw' option uses PostScript commands to draw
+ frames and color boxes in case of `dvips'.
+* Bugfixes:
+ - insufficient expression type detection within \colorlet;
+ - wrong calculation in the unit interval reduction for negative
+ integers (affecting color series and extended color expressions).
+
+2005/11/12 v2.07
+* New features:
+ - color model `Hsb' allows to specify hue in degrees;
+ - color model `tHsb' (`tuned Hsb') for user-defined hue
+ configuration on color wheels;
+ - easy generation of color harmonies derived from `Hsb' or `tHsb'
+ color wheels, e.g., \color{red>wheel,1,12} yields an `analogous'
+ color to `red' on a 12-spoke wheel;
+ - additional 317 predefined color names according to rgb.txt, which
+ is part of Unix/X11 distributions;
+ - `svgnames' option extended by 4 colors taken from rgb.txt;
+ - enhanced syntax for immediate conversion, e.g.,
+ \definecolor{foo}{rgb:gray}{0.3} or \color[rgb:wave]{478};
+ - \@ifundefinedcolor and \@ifundefinedmodel commands.
+* Changes:
+ - enhanced documentation;
+ - several changes to internal macros.
+* Bugfixes:
+ - wrong calculation of color series components in some cases of
+ negative step parameters.
+
+2005/10/15 v2.06
+* New features:
+ - color model `wave' for (approximate) visualisation of light
+ wavelengths, still somewhat experimental;
+ - pseudo-model `ps' for colors defined by literal PostScript code
+ in conjunction with `pstricks and `dvips'; an illustrative
+ example for a gamma-correction approach is given in xcolor2.tex;
+ - \substitutecolormodel command for replacement of missing or
+ faulty driver-specific color models;
+ - improved detection and handling of driver-specific color models;
+ - `dvipdfmx' and `xetex' options to support these drivers;
+ - generic driver test file xcolor4.tex.
+* Changes:
+ - \XC@strip@comma doesn't generate a trailing space anymore, which
+ improves also the output of the `testcolors' environment.
+
+2005/09/30 v2.05
+* New features:
+ - `testcolors' environment helps to test colors in different models,
+ showing both the visual result and the model-specific parameters;
+ - \extractcolorspecs puts model/color specification into two
+ separate commands, as opposed to \extractcolorspec;
+ - color names `pink' and `olive' added to the set of predefined
+ colors.
+* Bugfixes:
+ - \definecolor{foo}{named}{bar} did not work in v2.04.
+
+2005/09/23 v2.04
+* New features:
+ - preparation for usage of additional - driver-provided - color
+ models;
+ - `pstricks' users may now specify explicit color parameters within
+ \psset and related commands, e.g., \psset{linecolor=[rgb]{1,0,0}};
+ an illustrative example is given in xcolor2.tex.
+* Changes:
+ - color model names sanitized (i.e., turned to catcode 12)
+ throughout the package;
+ - \@namelet command deprecated because of name clash with
+ `memoir' - please use \XC@let@cc instead
+ (more \XC@let@.. commands are available as well);
+ - simplified color conversion code by using the new \XC@ifxcase
+ command;
+ - some minor changes to internal macros.
+
+2005/06/06 v2.03
+* New features:
+ - `fixpdftex' option loads `pdfcolmk' package in order to improve
+ pdfTeX's color behaviour during page breaks.
+* Changes:
+ - some minor changes to internal macros.
+* Bugfixes:
+ - due to an incorrect \if statement within \XC@info, \colorlet
+ caused trouble whenever its second argument started with two
+ identical letters, e.g., \colorlet{rab}{oof};
+ - argument processing of \XC@getcolor caused incompatibility with
+ `msc' package;
+ - `prologue' option caused incompatibility with `preview' package.
+
+2005/03/24 v2.02
+* New features:
+ - \aftergroupedef command to reproduce \aftergroupdef's behaviour
+ prior to v2.01;
+ - xcolor's homepage www.ukern.de/tex/xcolor.html now provides also
+ a ready-to-run TDS-compliant archive containing all required
+ files.
+* Changes:
+ - \rowcolors and friends are solely enabled by the `table' option;
+ - \@ifxempty changed back to more robust variant of v2.00.
+* Bugfixes:
+ - \psset{linecolor=\ifcase\foo red\or green\or blue\fi} did not work
+ with `pstricks' (error introduced in v2.01).
+
+2005/03/15 v2.01
+* New features:
+ - `prologue' option for comprehensive `named' color support in
+ conjunction with `dvips': on-the-fly generation of PostScript
+ prologue files with all color definitions, ready for dvips
+ inclusion and/or post-processing with device-specific parameters
+ (e.g., spot colors);
+ - dvips prologue file xcolor.pro to support additional `named'
+ colors;
+ - \colorlet may now also be used to create named colors from
+ arbitrary color expressions;
+ - enhanced color definition syntax to allow for target-model
+ specific color parameters, e.g.,
+ \definecolor{red}{rgb/cmyk}{1,0,0/0,1,1,0}, facilitating the
+ usage of tailor-made colors both for displays and printers;
+ - `deferred definition' of colors: \preparecolor and
+ \definecolors enable decoupling of color specification and control
+ sequence generation, especially useful (= memory saving) for large
+ lists of colors, of which only a few names are actually used;
+ - `dvipsnames*' and `svgnames*' options to support deferred
+ definition.
+* Changes:
+ - higher accuracy: most complement calculations are now exact for
+ all 5-digit decimals;
+ - \rangeRGB and similar variables may now be changed at any point
+ in a document;
+ - \aftergroupdef now performs only a first-level expansion of its
+ code argument;
+ - \XCfileversion and similar internal constants removed from .sty
+ and .def files;
+ - improved memory management (reduced generation of `multiletter
+ control sequences' by \@ifundefined tests);
+ - several internal macros improved and/or renamed.
+* Bugfixes:
+ - \XC@getcolor could cause unwanted spaces when \psset was used
+ inside |pspicture| environments (`pstricks');
+ - arithmetic overflow could happen when too many decimal digits
+ were used within color parameters, e.g., as a result of `fp'
+ calculations.
+
+2004/07/04 v2.00
+* New features:
+ - extended functionality for color expressions: mix colors like a
+ painter;
+ - support for color blending: specify color mix expressions that
+ are being blended with every displayed color;
+ - \xglobal command for selective control of globality for color
+ definitions, blends, and masks;
+ - multiple step operations (e.g., \color{foo!!+++}) and access to
+ individual members (e.g., \color{foo!![7]}) in color series;
+ - \providecolor command to define only non-existent colors;
+ - \definecolorset and \providecolorset commands to facilitate the
+ construction of color sets with common underlying color model;
+ - additional 147 predefined color names according to SVG 1.1
+ specification;
+ - `xpdfborder' key for setting the width of hyperlink borders in a
+ more driver-independent way if `dvips' is used.
+* Changes:
+ - `color' package now completely integrated within `xcolor';
+ - `override', `usenames', `nodvipsnames' options and \xdefinecolor
+ command no longer needed;
+ - `dvips' and `dvipsnames' options now independent of each other;
+ - \tracingcolors's behaviour changed to make it more versatile and
+ reduce log file size in standard cases;
+ - \rdivide's syntax made more flexible (divide by numbers and/or
+ dimensions);
+ - code restructured, some internal commands renamed;
+ - documentation rearranged and enhanced.
+* Bugfixes:
+ - \definecolor{foo}{named}{bar} did not work (error introduced in
+ v1.11);
+ - more robust behaviour of conditionals within `pstricks'
+ key-values.
+
+2004/05/09 v1.11
+* New features:
+ - switch \ifglobalcolors to control whether color definitions are
+ global or local;
+ - option `hyperref' provides color expression support for the
+ border colors of hyperlinks, e.g.,
+ \hypersetup{xurlbordercolor=red!50!yellow};
+ - internal hooks \XC@bcolor, \XC@mcolor, and \XC@ecolor for
+ additional code that has to be executed immediately before/after
+ the current color is being displayed.
+* Changes:
+ - \XC@logcolor renamed to \XC@display, which is now the core color
+ display command;
+ - improved interface to `pstricks'.
+
+2004/03/27 v1.10
+* New features:
+ - support for `named' model;
+ - support for `dvips' colors
+ (may now be used within color expressions);
+ - internal representation of `ordinary' and `named' colors merged
+ into unified data structure;
+ - allow multiple `-' signs at the beginning of color expressions.
+* Bugfixes:
+ - commands like \color[named]{foo} caused errors when color masking
+ or target model conversion were active;
+ - incompatibility with `soul' package: commands \hl, \ul, etc.
+ could yield unexpected results.
+* Documentation:
+ - added formula for general color expressions;
+ - enhanced text and index;
+ - removed dependence of index generation on local configuration
+ file.
+
+2004/02/16 v1.09
+* New features:
+ - color model `HTML', a 24-bit hexadecimal `RGB' variant;
+ allows to specify colors like \color[HTML]{AFFE90};
+ - color names `orange', `violet', `purple', and `brown' added to
+ the set of predefined colors.
+* New xcolor homepage: www.ukern.de/tex/xcolor.html
+* Bugfix: \xdefinecolor sometimes did not normalise its parameters.
+* Changes:
+ - slight improvements of the documentation;
+ - example file xcolor1.tex reorganised and abridged.
+
+2004/02/04 v1.08
+* New commands/features:
+ - \selectcolormodel to change the target model within a document;
+ - \adjustUCRBG to fine-tune undercolor-removal and
+ black-generation during conversion to `cmyk'.
+* Bugfix: color expressions did not work correctly in connection with
+ active `!' character, e.g., in case of \usepackage[frenchb]{babel}.
+* Code re-organisation:
+ - \XC@xdefinecolor merged into \xdefinecolor, making the first
+ command obsolete;
+ - several internal commands improved/streamlined.
+
+2004/01/20 v1.07
+* New feature: support for color masking and color separation.
+* New commands:
+ - \rmultiply to multiply a dimension register by a real number;
+ - \xcolorcmd to pass commands that are to be executed at the end
+ of the package.
+* Changes:
+ - more consistent color handling: extended colors now always take
+ precedence over standard colors;
+ - several commands improved by using code from the LaTeX kernel.
+* Documentation: some minor changes.
+* Example files: additional `pstricks' examples (file xcolor2.tex).
+
+2003/12/15 v1.06
+* New feature: extended color expressions, allowing for cascaded mix
+ operations, e.g., \color{red!30!green!40!blue}.
+* Documentation: new section on color expressions.
+* Bugfix: color series stepping did not work correctly within
+ non-displaying commands like \extractcolorspec{foo!!+}
+ (this bug was introduced in v1.05).
+* Renamed commands: \ukfileversion and similar internal constants
+ renamed to \XCfileversion etc.
+* Removed commands: \ifXCpst and \ifXCtable made obsolete by a simple
+ trick.
+
+2003/11/21 v1.05
+* Bugfixes:
+ - package option `hideerrors' should now work as expected;
+ - usage of `.' in the first color expression in a document caused
+ an error due to incorrect initialisation.
+* Code re-organisation: \extractcolorspec now uses \XC@splitcolor,
+ making \XC@extract obsolete.
+
+2003/11/09 v1.04
+* New feature: easy access to current color within color expressions.
+* New option: `override' to replace \definecolor by \xdefinecolor.
+* New command: \tracingcolors for logging color-specific information.
+
+2003/09/21 v1.03
+* Change: bypass strange behaviour of some drivers.
+* New feature: driver-sharing with `hyperref'.
+
+2003/09/19 v1.02
+* Change: \extractcolorspec and \colorlet now also accept color series
+ as arguments.
+
+2003/09/15 v1.01
+* New feature: \definecolorseries and friends.
+* Documentation: removed some `doc'-related side-effects.
+* Code re-organisation: all calculation-related tools put to one place.
+* Bugfixes:
+ - \@rdivide: added \relax to fix problem with negative numerators;
+ - \rowc@l@rs: replaced \@ifempty by \@ifxempty.
+
+2003/09/09 v1.00
+* First published release.