\RedeclareSectionCommand[%
beforeskip=0.6\baselineskip,
afterskip=0.5\baselineskip,
font=\bfseries\sffamily\LARGE\color{fsiGrey}
]{chapter}

\renewcommand*\familydefault{\sfdefault}

\makeatletter
\renewcommand\section{\@startsection
	{section}{1}{0mm}%         % name, ebene, einzug
	{0.6\baselineskip}%            % vor-abstand
	{0.5\baselineskip}%            % nach-abstand
	{\bfseries\sffamily\large\color{fsiOrange}}%      % layout
}
\makeatother
\makeatletter
\renewcommand\subsection{\@startsection
	{subsection}{2}{0mm}%      % name, ebene, einzug
	{0.6\baselineskip}%            % vor-abstand
	{0.5\baselineskip}%            % nach-abstand
	{\bfseries\sffamily\color{fsiOrange}}%           % layout
}
\makeatother
\makeatletter
\renewcommand\subsubsection{\@startsection
	{subsubsection}{3}{0mm}%      % name, ebene, einzug
	{0.35\baselineskip}%            % vor-abstand
	{0.25\baselineskip}%            % nach-abstand
	{\sffamily\color{fsiOrange}}%           % layout
}
\makeatother




% auch subsubsection nummerieren
\setcounter{secnumdepth}{3}
\setcounter{tocdepth}{3}

\counterwithout{figure}{chapter}
\counterwithout{table}{chapter}