diff --git a/src/Mod/Import/App/ExportOCAF.cpp b/src/Mod/Import/App/ExportOCAF.cpp
index 9ba1a4d0ae..3a76769b42 100644
--- a/src/Mod/Import/App/ExportOCAF.cpp
+++ b/src/Mod/Import/App/ExportOCAF.cpp
@@ -104,7 +104,7 @@
 
 static inline Quantity_ColorRGBA convertColor(const App::Color &c)
 {
-    return Quantity_ColorRGBA(Quantity_Color(c.r, c.g, c.b, OCC_COLOR_SPACE), c.a);
+    return Quantity_ColorRGBA(Quantity_Color(c.r, c.g, c.b, OCC_COLOR_SPACE), 1.0 - c.a);
 }
 
 using namespace Import;
diff --git a/src/Mod/Import/App/ImportOCAF.cpp b/src/Mod/Import/App/ImportOCAF.cpp
index f92e7300b3..a6c392f0b7 100644
--- a/src/Mod/Import/App/ImportOCAF.cpp
+++ b/src/Mod/Import/App/ImportOCAF.cpp
@@ -122,7 +122,7 @@ static inline App::Color convertColor(const Quantity_ColorRGBA &c)
     return App::Color(static_cast<float>(r),
                       static_cast<float>(g),
                       static_cast<float>(b),
-                      static_cast<float>(c.Alpha()));
+                      1.0f - static_cast<float>(c.Alpha()));
 }
 
 #define OCAF_KEEP_PLACEMENT
diff --git a/src/Mod/Import/App/ImportOCAF2.cpp b/src/Mod/Import/App/ImportOCAF2.cpp
index 3b0d6ea49a..1c803be05c 100644
--- a/src/Mod/Import/App/ImportOCAF2.cpp
+++ b/src/Mod/Import/App/ImportOCAF2.cpp
@@ -92,12 +92,12 @@ static inline App::Color convertColor(const Quantity_ColorRGBA &c)
     return App::Color(static_cast<float>(r),
                       static_cast<float>(g),
                       static_cast<float>(b),
-                      static_cast<float>(c.Alpha()));
+                      1.0f - static_cast<float>(c.Alpha()));
 }
 
 static inline Quantity_ColorRGBA convertColor(const App::Color &c)
 {
-    return Quantity_ColorRGBA(Quantity_Color(c.r, c.g, c.b, OCC_COLOR_SPACE), c.a);
+    return Quantity_ColorRGBA(Quantity_Color(c.r, c.g, c.b, OCC_COLOR_SPACE), 1.0f - c.a);
 }
 
 static inline std::ostream& operator<<(std::ostream& os, const Quantity_ColorRGBA &c) {