Ich nutze gerade folgenden Befehl:
\marginnote{\nameref{part:theoretischegrundlagen} Bla bla}...
\usepackage{marginnote}						
\definecolor{gray}{rgb}{0.5,0.5,0.5}		
\renewcommand*{\marginfont}{\color{gray}\sffamily}
...
Danke für Tips!
\marginnote{\nameref{part:theoretischegrundlagen} Bla bla}...
\usepackage{marginnote}						
\definecolor{gray}{rgb}{0.5,0.5,0.5}		
\renewcommand*{\marginfont}{\color{gray}\sffamily}
...
\documentclass{article}
\usepackage{nameref}
\usepackage{color}
\usepackage{marginnote}
\definecolor{gray}{rgb}{0.5,0.5,0.5}       
\renewcommand*{\marginfont}{\color{gray}\sffamily} 
\begin{document}
\section{abc}
\label{part:theoretischegrundlagen}
\marginnote{\nameref{part:theoretischegrundlagen} Bla bla}
\end{document}
\hypersetup{colorlinks=true,          % farbige Links	
			linkcolor=black,          %interne Links
			urlcolor=blue				% URL Links
}
\documentclass{article}
\usepackage{xcolor}
\usepackage{hyperref}
\makeatletter
\let\orig@declaredcolor\@declaredcolor
\def\@declaredcolor#1{%
  \colorlet{current}{#1}%
  \orig@declaredcolor{#1}%
}
\makeatother
\color{black}
\hypersetup{%
  colorlinks=true,%
  linkcolor=current,%
  urlcolor=blue%
}
  
\begin{document}
\section{test}
\label{test}
\autoref{test}
\textcolor{red}{\autoref{test}}
\url{test}
\end{document}