定制一个属于自己的章节样式

代码如下：

\documentclass[11pt,a4paper,twoside,openright]{book}
%nummering
\usepackage{tikz}
\usetikzlibrary{matrix}
\usepackage{fancyhdr}
\pagestyle{fancy}
\pagestyle{plain}
\lhead{}
\chead{}
\rhead{}
\lfoot{}
\cfoot{\thepage}
\rfoot{}
\usepackage[dutch]{babel}
\usepackage[babel=true]{csquotes}
\usepackage[T1]{fontenc}
\usepackage[explicit]{titlesec}
\usepackage{xcolor}
\usepackage{charter}

\definecolor{mybluei}{RGB}{5, 0, 100}
\definecolor{myblueii}{RGB}{0, 0, 100}
\usepackage{rotating, graphicx}
\usepackage{titlesec}
\usepackage{tcolorbox}
\newcommand\ChapterFont{\rmfamily\selectfont\huge}
\newcommand\SectionFont{\bfseries\rmfamily\selectfont\Large}

\titleformat{\chapter}[block]
 {\normalfont\ChapterFont\huge\color{myblueii}}%\raisebox{-0.6\height}
 {\tcbset{colframe=mybluei, boxrule=0.8pt, left=0pt, right=0pt, top=0pt, bottom=0pt}\raisebox{-0.48\height}{\rotatebox{90}{\tcbox[boxsep=4pt, colback= white ]{\color{mybluei}\Large\chaptertitlename}}}\hskip 0.25em\mbox{\tcbox[ boxsep=12pt, colback=mybluei, tcbox raise = -35pt]{\color{white}\bfseries\fontsize{70}{70}\selectfont\thechapter}}}
 {0.5em}
 {#1\vskip0.6ex\endgraf\titlerule[1ex]}[]

 \titleformat{name=\chapter,numberless}[block]
 {\normalfont\selectfont\huge\color{myblueii}}
 {}
 {0pt}
 {\parbox[b]{70pt}{\mbox{}}%
 \hspace{15pt}%
 \parbox[b]{\dimexpr\textwidth-15pt}{%
 \raggedright\bfseries#1\vskip6pt%
 }%
 }
 \titleformat{\section}
 {\normalfont\small\sffamily\SectionFont\color{myblueii}}
 {\colorbox{mybluei}{%
        \parbox[c][16pt][c]{40pt}{%
            \centering\textcolor{white}{\SectionFont\Large\rmfamily\thesection}%
        }%
    }%
 }
 {1em}
 {#1}
 [\vspace{-0.755\baselineskip}%
 \color{myblueii}\hspace*{\dimexpr40pt+2\fboxsep\relax}%
 \rule{\dimexpr\textwidth-40pt-2\fboxsep\relax}{1pt}%
 ]
  \usepackage{amsmath, amsthm, amssymb, amsfonts, enumerate}%, dlfltxbcodetips
 \renewcommand{\qedsymbol}{$\blacksquare$}

\usepackage{lipsum}

\begin{document}

\chapter{Vectorruimtem}
\lipsum[1]

\end{document}

选自：http://tex.stackexchange.com/questions/215715/chapter-template