diff --git a/libsrc/visualization/vsmesh.cpp b/libsrc/visualization/vsmesh.cpp
index 86c67d8d..3c06ecb6 100644
--- a/libsrc/visualization/vsmesh.cpp
+++ b/libsrc/visualization/vsmesh.cpp
@@ -1053,7 +1053,7 @@ namespace netgen
          }
          else
          {
-            matcol[0] = 1.0;
+            matcol[0] = 0.0;
             matcol[1] = 1.0;
             matcol[2] = 0.0;
          }
diff --git a/libsrc/visualization/vsocc.cpp b/libsrc/visualization/vsocc.cpp
index d0c8e8af..43688198 100644
--- a/libsrc/visualization/vsocc.cpp
+++ b/libsrc/visualization/vsocc.cpp
@@ -553,7 +553,7 @@ namespace netgen
             }
             else
             {
-               mat_col[0] = 1.0;
+               mat_col[0] = 0.0;
                mat_col[1] = 1.0;
                mat_col[2] = 0.0;
             }