diff --git a/30_Thesis/sections/40_concept.tex b/30_Thesis/sections/40_concept.tex
index 9fd1ad1..e1520de 100644
--- a/30_Thesis/sections/40_concept.tex
+++ b/30_Thesis/sections/40_concept.tex
@@ -116,7 +116,7 @@ The case study used in this thesis is a simplified version from forestry.
 The used characteristics and attributes are shown in \autoref{fig:Concept:ForestExample}. Additionally as example are given preferences, a configuration state and a finished configuration.
 
 \begin{figure}
-    \begin{mdframed}[frametitle={Example for Forest Use Case}]
+    \begin{mdframed}[frametitle={Example for Forest Use Case}, linecolor=black, frametitlerulecolor=black, frametitlebackgroundcolor=gray!5]
         In this example there are a small group of users. The use case is a piece of forest and variables are for example harvesting activity, which trees to grow and accessibility for people.
         \begin{align}
             \begin{split}