diff --git a/presentation_irstea/beamercolorthemeirstea.sty b/presentation_irstea/beamercolorthemeirstea.sty
index bf1bc8fc10f3b4201665744b7a15d89938e0ce81..0ec8cf9dd4563395b67434360bf2f539b96830e0 100644
--- a/presentation_irstea/beamercolorthemeirstea.sty
+++ b/presentation_irstea/beamercolorthemeirstea.sty
@@ -25,10 +25,15 @@
 \setbeamerfont{block title}{size=\large,series=\bf}
 \setbeamercolor{upper separation line head}{fg=white}
 
+\setbeamercolor*{block title alerted}{fg=ta3scarletred,bg=gris!22}
+\setbeamercolor*{block body alerted}{bg=gris!10,fg=black}
+
 \setbeamercolor*{example body}{fg=prairie,bg=white}
 \setbeamercolor*{example text}{fg=prairie,bg=white}
 \setbeamercolor*{example title}{bg=ocean,fg=white}
 
+
+
 %\setbeamercolor{alerted text}{fg=ta3gray}
 
 %\setbeamercolor{example text}{fg=taorange}