\documentclass{article}
\usepackage[table,dvipsnames]{xcolor}

\newcommand{\testbox}[2][]{%
\leavevmode\hbox to 2em{{\ifx.#1.\color{#2}\else\color[#1]{#2}\fi\vrule width 2em height 1.5ex}}}
\def\testRGB{%
   \testbox{red}\testbox{green}\testbox{blue}}

\begin{document}

\newcommand{\CB}[2][]{\ifx.#1.\colorbox{#2}{#2}\else\colorbox[#1]{#2}{#2}\fi}
\section{Introduction}

\begin{itemize}
\item
\definecolor{CorporateColor}{rgb}{0,0,1}
\testbox{CorporateColor}; A 75\% tint \testbox{CorporateColor!75}.

\item ``use hsb definitions''

\item 40\% \testbox{green} + 60\% \testbox{yellow} = \testbox{green!40!yellow}

\item Complement: \testbox{-green!40!yellow}

\item 3$\times$\testbox{-green!40!yellow}
   + 2$\times$\testbox{green}
   + 1$\times$\testbox{red}
 = \testbox{rgb:-green!40!yellow,3;green!40!yellow,2;red,1}

\item \testbox[wave]{485}

\item \testbox{red}\testbox{red>wheel,60}\testbox{red>wheel,120}\testbox{red>wheel,180}%
\testbox{red>wheel,240}\testbox{red>wheel,300}\testbox{red>wheel,360}.
\item \testbox{red}\testbox{red>wheel,1,6}\testbox{red>wheel,2,6}\testbox{red>wheel,3,6}%
\testbox{red>wheel,4,6}\testbox{red>wheel,5,6}\testbox{red>wheel,6,6}
\item \testbox{red}\testbox{red>twheel,1,6}\testbox{red>twheel,2,6}\testbox{red>twheel,3,6}%
\testbox{red>twheel,4,6}\testbox{red>twheel,5,6}\testbox{red>twheel,6,6}
\end{itemize}

\section{Global}
%\definecolorstrue
\colorlet{funny}{red}

\testbox{funny} {\colorlet{funny}{blue}\testbox{funny}} \testbox{funny}

\globalcolorstrue
\testbox{funny} {\colorlet{funny}{blue}\testbox{funny}} \testbox{funny}
\globalcolorsfalse

\section{XGlobal}
\colorlet{fuu}{red}
\colorlet{baz}{green}
fuu is red: \testbox{fuu}
baz is green: \testbox{baz}
\begingroup
\colorlet{fuu}{purple}
\colorlet{baz}{orange}
Now, fuu is purple: \testbox{fuu}
and baz is orange: \testbox{baz}
\begingroup
\xglobal\colorlet{fuu}{pink}
\colorlet{baz}{yellow}
Now, fuu is pink: \testbox{fuu}
and baz is yellow: \testbox{baz}
\endgroup
Now, baz is orange again: \testbox{baz}
but, fuu is still pink: \testbox{fuu}
\endgroup
Now, baz is green again: \testbox{baz}
and, fuu is \emph{still} pink: \testbox{fuu}

\section{Color Sets}
\begingroup
\definecolorset{rgb}{light}{}{red,1,.9,.9;green,.9,1,.9;blue,.9,.9,1}
\testbox{lightred}
\testbox{lightblue}
\testbox{lightgreen}
\endgroup

\section{Color Series}
\begingroup
\color{blue}
\definecolorseries{foo}{rgb}{last}{.}{-.}
\resetcolorseries[5]{foo}
\def\test{\hbox to 1em{{\color{foo!!+}\vrule width 1em height 1.5ex}}}
Test\test\test\test\test\test\test Test

\resetcolorseries[5]{foo}
\def\test{\hbox to 1em{{\color{foo!!++}\vrule width 1em height 1.5ex}}}
Test\test\test\test\test\test\test Test

\resetcolorseries[5]{foo}
\def\test{\hbox to 1em{{\color{foo!![2]}\vrule width 1em height 1.5ex}}}
Test\test\test\test\test\test\test Test

\endgroup

\section{Blending}

No blend: \testRGB

\blendcolors{!50!yellow}
With blend: \testRGB

Again \blendcolors{!50!yellow}
With blend: \testRGB


Again Starred \blendcolors*{!50!yellow}
With blend: \testRGB

Reset \blendcolors{}
No blend: \testRGB

% \section{Masking}

% No Mask: \testRGB

% \maskcolors{yellow}
% Yellow: \testRGB

% \maskcolors{magenta}
% Magenta: \testRGB

% Disable:\maskcolorsfalse\testRGB\maskcolorstrue

% Magenta: \testRGB

% \maskcolors{}

\section{Boxes}
\definecolor{light}{gray}{0.9}

\colorbox{gray}{\textcolor{light}{Light within Gray}}

vs. \colorbox[gray]{0.5}{\textcolor{light}{Light within Gray}}

\fcolorbox{blue}{red}{\textcolor{green}{Green in Red surrounded by Blue}}

\fcolorbox[cmyk]{0,1,0,0}{1,0,0,0}{\textcolor[cmyk]{0,0,1,0}{Yellow in Cyan surrounded by Magenta}}

\bgroup\color{orange}\boxframe{10em}{2ex}{1ex}\egroup

\section{Arithmetic}
\makeatletter
\newdimen\dima
\newdimen\dimb
\newcount\numa
\newcount\numb

\dima=5pt\relax
\dimb=10pt\relax
\numa=5\relax
\numb=10\relax

A=\the\dima;B=\the\numb;
\rmultiply\dima\numb
A=A*B = \the\dima;

\dima=5pt\relax
A=\the\dima;
\lshift\dima
A=10*A=\the\dima;
\rshift\dima
A=A/10=\the\dima.

\dima=5pt\relax
A=\the\dima;
\llshift\dima
A=100*A=\the\dima;
\rrshift\dima
A=A/100=\the\dima.

10*13 = \lshiftnum{13};
100*13 = \llshiftnum{13}.

A=10*13 = \lshiftset\dima{13}\relax \the\dima;
A=100*13 = \llshiftset\dima{13}\relax \the\dima;

\section{Colored Tables}
\rowcolors[\hline]{1}{green!25}{yellow!50}
\begin{tabular}{ll}
test & row \number\rownum\\
test & row \number\rownum\\
\rowcolor{blue!25}
test & row \number\rownum\\
test & row \number\rownum\\
\hiderowcolors
test & row \number\rownum\\
test & row \number\rownum\\
\showrowcolors
test & row \number\rownum\\
test & row \number\rownum\\
\multicolumn{1}%
 {>{\columncolor{red!12}}l}{test} & row \number\rownum\\
\end{tabular}

\section{Color Compararisons}
\definecolors{JungleGreen,DarkOrchid}

\begingroup
\small\sffamily
\rowcolors1{}{}
\begin{testcolors}[rgb,cmyk,hsb,HTML,gray]
\testcolor{red}
\testcolor{green}
\testcolor{blue}
\testcolor{cyan}
\testcolor{magenta}
\testcolor{yellow}
\testcolor{orange}
\testcolor{violet}
\testcolor{purple}
\testcolor{brown}
\testcolor{pink}
\testcolor{olive}
\testcolor{black}
\testcolor{darkgray}
\testcolor{gray}
\testcolor{lightgray}
\testcolor{white}
\noalign{\medskip}\hline\noalign{\medskip}
\testcolor{-red}
\testcolor{-green}
\testcolor{-blue}
\testcolor{-cyan}
\testcolor{-magenta}
\testcolor{-yellow}
\testcolor{-orange}
\testcolor{-violet}
\testcolor{-purple}
\testcolor{-brown}
\testcolor{-pink}
\testcolor{-olive}
\testcolor{-black}
\testcolor{-darkgray}
\testcolor{-gray}
\testcolor{-lightgray}
\testcolor{-white}
\noalign{\medskip}\hline\noalign{\medskip}
\testcolor{JungleGreen}
\testcolor{DarkOrchid}
\noalign{\medskip}\hline\noalign{\medskip}
\testcolor{-JungleGreen}
\testcolor{-DarkOrchid}
\end{testcolors}
\endgroup

\section{Boxes}
\newbox\mybox
\setbox\mybox=\hbox{Should NOT be Red!}
\copy\mybox
\setbox\mybox=\hbox{Should be Red!}
{\color{red}\copy\mybox}
\end{document}
