Quatrième de couverture

%----------------------------------------------------------------------------------------
%   PACKAGES AND OTHER DOCUMENT CONFIGURATIONS
%----------------------------------------------------------------------------------------

\documentclass[a4paper, english, french, 11pt]{book} % A4 paper size, default 11pt font size and oneside for equal margins

\usepackage[svgnames]{xcolor} % Required for colour specification

\usepackage[utf8]{inputenc} % Required for inputting international characters
\usepackage[T1]{fontenc} % Output font encoding for international characters
\usepackage{fouriernc} % Use the New Century Schoolbook font
\usepackage{graphicx}
\usepackage{babel}
\usepackage[explicit]{titlesec}
\usepackage{setspace}
\definecolor{darkblue}{rgb}{0.12,0.47,0.87}
\newlength\chapnumb
\setlength\chapnumb{3cm}
\onehalfspacing
%\titleformat{\chapter}[display] {\fontsize{17pt}{12pt}\selectfont \bfseries}{\textcolor{darkblue} {\chaptertitlename\ \thechapter: #1}}{20pt}{\Huge}
%\titleformat{name=\chapter,numberless}[display] {\fontsize{17pt}{12pt}\selectfont \bfseries}{\textcolor{darkblue} {#1}}{20pt}{\Huge}

\titleformat{\chapter}[block] {
    \normalfont\sffamily\color{blue}\LARGE}{}{0pt} {
    \parbox[b]{\chapnumb}{
        \fontsize{90}{10}\selectfont\thechapter}
    \parbox[b]{\dimexpr\textwidth-\chapnumb\relax}{
        \raggedleft
        \hfill{{#1}}\\
        \rule{\dimexpr\textwidth-\chapnumb\relax}{0.4pt}
    }
}

\titleformat{name=\chapter,numberless}[block]
{\normalfont\sffamily}{}{0pt}
{\parbox[b]{\chapnumb}{%
        \mbox{}}%
    \parbox[b]{\dimexpr\textwidth-\chapnumb\relax}{%
        \raggedleft%
        \hfill{\Large#1}\\
        \rule{\dimexpr\textwidth-\chapnumb\relax}{0.4pt}}}

\begin{document}

%----------------------------------------------------------------------------------------
%   TITLE PAGE
%----------------------------------------------------------------------------------------

\begin{titlepage} % Suppresses headers and footers on the title page

    \centering % Centre everything on the title page

    %------------------------------------------------
    %   Top rules
    %------------------------------------------------

    \rule{\textwidth}{1pt} % Thick horizontal rule

    \vspace{2pt}\vspace{-\baselineskip} % Whitespace between rules

    \rule{\textwidth}{0.4pt} % Thin horizontal rule

    \vspace{0.05\textheight} % Whitespace between the top rules and title

    %------------------------------------------------
    %   Title
    %------------------------------------------------

    \textcolor{Orange}{ % Red font color
        {\LARGE \bf Notice d'utilisation}\\[0.5\baselineskip]} % Title line 1
    \textcolor{White}{{\Large x}\\[0.5\baselineskip]} % Title line 2
    \textcolor{Blue}{{tit} % Title line 3
    }

    \vspace{0.025\textheight} % Whitespace between the title and short horizontal rule

    \rule{0.3\textwidth}{0.4pt} % Short horizontal rule under the title

    \vspace{0.05\textheight} % Whitespace between the thin horizontal rule and the author name

    %------------------------------------------------
    %   Author
    %------------------------------------------------

    {\Large \textsc{Aurelien Cocq}}\\ % Author name
    \vfill % Whitespace between the author name and publisher
    {}

    \vfill % Whitespace between the author name and publisher
    %------------------------------------------------
    %   Version
    %------------------------------------------------
    {\LARGE Version 2.0 - Mars 2020}
    \vfill % Whitespace between the author name and publisher
    %------------------------------------------------
    %   Publisher
    %------------------------------------------------

    %{\large\textcolor{Red}{\plogo}}\\ % Publisher logo

    {\large\textsc{Bionic}} % Publisher

    \vspace{0.01\textheight} % Whitespace under the publisher text

    %------------------------------------------------
    %   Bottom rules
    %------------------------------------------------

    \rule{\textwidth}{0.4pt} % Thin horizontal rule

    \vspace{2pt}\vspace{-\baselineskip} % Whitespace between rules

    \rule{\textwidth}{1pt} % Thick horizontal rule

\end{titlepage}

%----------------------------------------------------------------------------------------
\thispagestyle{empty}
\cleardoublepage
\tableofcontents
\thispagestyle{empty}
\chapter{Préface}
\chapter{one}
\end{document}