diff --git a/intro/ttnn.cls b/intro/ttnn.cls
index 3d9a6bc..a85160a 100644
--- a/intro/ttnn.cls
+++ b/intro/ttnn.cls
@@ -82,9 +82,9 @@
 \fi
 % Titres en sans-serif + couleur
 \RequirePackage{xcolor}
-\definecolor{jresblue}{rgb}{0.,0.2,0.375} % correspond à 0,32,96 du modèle word
+\definecolor{ttnncolor}{rgb}{0.375,0.3,0.25}
 \RequirePackage{sectsty}
-\allsectionsfont{\sffamily\color{jresblue}}
+\allsectionsfont{\sffamily\color{ttnncolor}}
 %
 % Interligne
 \RequirePackage{setspace}
@@ -117,14 +117,14 @@
   \newpage
   \begin{center}%
   \let \footnote \thanks
-    {\huge\bfseries\sffamily\color{jresblue} \@title \par}%
-    {\Large\sffamily\color{jresblue}
+    {\huge\bfseries\sffamily\color{ttnncolor} \@title \par}%
+    {\Large\sffamily\color{ttnncolor}
       \lineskip .5em%
       \begin{tabular}[t]{c}%
         \@author
       \end{tabular}\par}%
     \vskip 1em%
-    {\large\sffamily\color{jresblue} \@date}%
+    {\large\sffamily\color{ttnncolor} \@date}%
   \par
   \end{center}%
   \vskip 1.5em
@@ -142,7 +142,7 @@
 \newcommand{\motscles}[1]{%
   \vskip 18pt
   \noindent%
-  {\Large\sffamily\color{jresblue}\textbf{Mots clefs}}%
+  {\Large\sffamily\color{ttnncolor}\textbf{Mots clefs}}%
   \par\begin{itshape}#1\end{itshape}}
 %
 % Format paragraphe
@@ -197,7 +197,7 @@
 % style urls
 \urlstyle{same}
 \hypersetup{colorlinks,
-  urlcolor=jresblue,
+  urlcolor=ttnncolor,
   linkcolor=black,
   filecolor=black,
   citecolor=black}