diff --git a/src/gui_main.py b/src/gui_main.py
index a50a21a..3b2a614 100644
--- a/src/gui_main.py
+++ b/src/gui_main.py
@@ -20,7 +20,12 @@ def run_installer(download_folder_tmp, col_isDark):
 
     app.resizable(False, False)
 
-    set_default_color_theme(os.path.join(download_folder_tmp,"./theme.json"))
+    try:
+        set_default_color_theme(os.path.join(download_folder_tmp,"./theme.json"))
+    except FileNotFoundError:
+        set_default_color_theme("dark-blue")
+        set_appearance_mode("dark")
+        print("Could not get theme from system.")
 
     def print_ahoj():
         spitfire_source_info = {
diff --git a/src/main.py b/src/main.py
index 88f0a83..e9baadb 100644
--- a/src/main.py
+++ b/src/main.py
@@ -8,7 +8,7 @@ def main():
         return
     
     from gui_main import run_installer
-    run_installer("./tmp",(10, 10, 10),(0, 120, 215),true)
+    run_installer("./tmp",True)
 
 if __name__ == "__main__":
     main()
\ No newline at end of file