章节标题的可变颜色

Question

以下 def 将前三个字母作为参数：

\newcounter{colorCounter}
\def\@sectioncolor#1#2#3{%
  {%
    \color{%
      \ifcase\value{colorCounter}%
        blue\or%
        red\or%
        orange\or%
        green\or%
        purple\or%
        brown\else%
        headercolor\fi%
    } #1#2#3%
  }%
  \stepcounter{colorCounter}%
}

它实际上会为部分名称的前三个字母着色。我该如何让它为整个部分名称着色？

我可以把整个段落作为论据吗？

编辑

为了让它发挥作用，还必须

\renewcommand{\section}[1]{
  \par\vspace{\parskip}
  {%
    \LARGE\headingfont\color{headercolor}%
    \@sectioncolor #1%
  }
  \par\vspace{\parskip}
}

编辑2

梅威瑟：

\documentclass{article}

\usepackage{fontspec}
\usepackage{polyglossia}

% fonts:
\defaultfontfeatures{Scale=MatchLowercase,Mapping=tex-text}
\setmainfont{DejaVu Sans}
\setsansfont{DejaVu Sans}
\setmonofont{DejaVu Sans Mono}

\usepackage{xcolor}
\colorlet{headercolor}{gray}

\newcounter{colorCounter}
\def\@sectioncolor#1#2#3{%
  {%
    \color{%
      \ifcase\value{colorCounter}%
        blue\or%
        red\or%
        orange\or%
        green\or%
        purple\or%
        brown\else%
        headercolor\fi%
    } #1#2#3%
  }%
  \stepcounter{colorCounter}%
}

\renewcommand{\section}[1]{
  \par\vspace{\parskip}
  {%
    \LARGE\color{headercolor}%
    \@sectioncolor #1%
  }
  \par\vspace{\parskip}
}

\begin{document}


\section{aaaaaa}

\section{bbbbbb}

\section{cccccc}

\end{document}

Answer 1

使用sectsty（或者，再做一些工作titlesec）：

\documentclass{article}

\usepackage{fontspec}
\usepackage{xcolor}
\usepackage{sectsty}

\colorlet{headercolor}{gray}

\newcounter{colorCounter}
\newcommand\sectioncolor{%
    \color{%
      \ifcase\value{colorCounter}%
        blue\or
        red\or
        orange\or
        green\or
        purple\or
        brown\else
        headercolor\fi
  }%
  \stepcounter{colorCounter}%
  % Remove the following line if you don't want to cycle
  \ifnum\value{colorCounter}=7 \setcounter{colorCounter}{0}\fi
}

% in section titles \sectioncolor will be executed
\sectionfont{\sectioncolor}

% don't number sections
\setcounter{secnumdepth}{0}

\begin{document}

\section{aaaaaa}

\section{bbbbbb}

\section{cccccc}

\section{dddddd}

\section{eeeeee}

\section{ffffff}

\section{gggggg}

\section{hhhhhh}

\end{document}

Answer 2

哦，我解决了：

\documentclass{article}

\usepackage{fontspec}
\usepackage{polyglossia}

% fonts:
\defaultfontfeatures{Scale=MatchLowercase,Mapping=tex-text}
\setmainfont{DejaVu Sans}
\setsansfont{DejaVu Sans}
\setmonofont{DejaVu Sans Mono}

\usepackage{xcolor}
\colorlet{headercolor}{gray}

\newcounter{ColorCounter}
\newcommand\Color{
  \color{%
    \ifcase\value{ColorCounter}%
      blue\or%
      red\or%
      orange\or%
      green\or%
      purple\or%
      brown\else%
      headercolor%
    \fi%
  }
}

\renewcommand{\section}[1]{
  \par\vspace{\parskip}
  {
    \LARGE\Color #1
  }
  \par\vspace{\parskip}
  \stepcounter{ColorCounter}
}

\begin{document}


\section{aaaaaa}

\section{bbbbbb}

\section{cccccc}

\end{document}