diff --git a/app/operations/gimpoperationsemiflatten.c b/app/operations/gimpoperationsemiflatten.c
index 1352f02bb2..b7dc8b94ec 100644
--- a/app/operations/gimpoperationsemiflatten.c
+++ b/app/operations/gimpoperationsemiflatten.c
@@ -73,7 +73,7 @@ gimp_operation_semi_flatten_class_init (GimpOperationSemiFlattenClass *klass)
   GObjectClass                  *object_class    = G_OBJECT_CLASS (klass);
   GeglOperationClass            *operation_class = GEGL_OPERATION_CLASS (klass);
   GeglOperationPointFilterClass *point_class     = GEGL_OPERATION_POINT_FILTER_CLASS (klass);
-  GimpRGB                        white;
+  GeglColor                     *color;
 
   object_class->set_property = gimp_operation_semi_flatten_set_property;
   object_class->get_property = gimp_operation_semi_flatten_get_property;
@@ -88,13 +88,13 @@ gimp_operation_semi_flatten_class_init (GimpOperationSemiFlattenClass *klass)
 
   point_class->process     = gimp_operation_semi_flatten_process;
 
-  gimp_rgba_set (&white, 1.0, 1.0, 1.0, 1.0);
+  color = gegl_color_new ("white");
 
   g_object_class_install_property (object_class, PROP_COLOR,
-                                   gimp_param_spec_rgb ("color",
+                                   gegl_param_spec_color ("color",
                                                         _("Color"),
                                                         _("The color"),
-                                                        FALSE, &white,
+                                                        /*FALSE,*/ color,
                                                         G_PARAM_READWRITE |
                                                         G_PARAM_CONSTRUCT));
 }
@@ -115,7 +115,7 @@ gimp_operation_semi_flatten_get_property (GObject    *object,
   switch (property_id)
     {
     case PROP_COLOR:
-      gimp_value_set_rgb (value, &self->color);
+      g_value_set_object (value, self->color);
       break;
 
     default:
@@ -135,7 +135,7 @@ gimp_operation_semi_flatten_set_property (GObject      *object,
   switch (property_id)
     {
     case PROP_COLOR:
-      gimp_value_get_rgb (value, &self->color);
+      g_set_object  (&self->color, g_value_get_object (value));
       break;
 
    default:
@@ -177,9 +177,14 @@ gimp_operation_semi_flatten_process (GeglOperation       *operation,
         }
       else
         {
-          dest[RED]   = src[RED]   * alpha + self->color.r * (1.0 - alpha);
-          dest[GREEN] = src[GREEN] * alpha + self->color.g * (1.0 - alpha);
-          dest[BLUE]  = src[BLUE]  * alpha + self->color.b * (1.0 - alpha);
+          gdouble rgba[4];
+
+          gegl_color_get_rgba_with_space (self->color, &rgba[0], &rgba[1],
+                                          &rgba[2], &rgba[3], NULL);
+
+          dest[RED]   = src[RED]   * alpha + rgba[0] * (1.0 - alpha);
+          dest[GREEN] = src[GREEN] * alpha + rgba[1] * (1.0 - alpha);
+          dest[BLUE]  = src[BLUE]  * alpha + rgba[2] * (1.0 - alpha);
           dest[ALPHA] = 1.0;
         }
 
diff --git a/app/operations/gimpoperationsemiflatten.h b/app/operations/gimpoperationsemiflatten.h
index be6311e630..7e537caf45 100644
--- a/app/operations/gimpoperationsemiflatten.h
+++ b/app/operations/gimpoperationsemiflatten.h
@@ -40,7 +40,7 @@ struct _GimpOperationSemiFlatten
 {
   GeglOperationPointFilter  parent_instance;
 
-  GimpRGB                   color;
+  GeglColor                *color;
 };
 
 struct _GimpOperationSemiFlattenClass
diff --git a/app/pdb/plug-in-compat-cmds.c b/app/pdb/plug-in-compat-cmds.c
index 20721d7169..d65bf85717 100644
--- a/app/pdb/plug-in-compat-cmds.c
+++ b/app/pdb/plug-in-compat-cmds.c
@@ -3947,15 +3947,13 @@ plug_in_semiflatten_invoker (GimpProcedure         *procedure,
         {
           GeglNode  *node;
           GeglColor *color;
-          GimpRGB    rgb;
 
           color = gimp_context_get_background (context);
-          gegl_color_get_rgba_with_space (color, &rgb.r, &rgb.g, &rgb.b, &rgb.a, NULL);
 
           node =
             gegl_node_new_child (NULL,
                                  "operation", "gimp:semi-flatten",
-                                 "color",     &rgb,
+                                 "color",     color,
                                  NULL);
 
           gimp_drawable_apply_operation (drawable, progress,
diff --git a/pdb/groups/plug_in_compat.pdb b/pdb/groups/plug_in_compat.pdb
index 368f319ca1..b2b519c835 100644
--- a/pdb/groups/plug_in_compat.pdb
+++ b/pdb/groups/plug_in_compat.pdb
@@ -2090,10 +2090,10 @@ sub plug_in_laplace {
 
     $help = <<'HELP';
 This plug-in creates one-pixel wide edges from the
-image, with the value proportional to the gradient. 
-It uses the Laplace operator (a 3x3 kernel with -8 
-in the middle). The image has to be laplacered to 
-get useful results, a gauss_iir with 1.5 - 5.0 
+image, with the value proportional to the gradient.
+It uses the Laplace operator (a 3x3 kernel with -8
+in the middle). The image has to be laplacered to
+get useful results, a gauss_iir with 1.5 - 5.0
 depending on the noise in the image is best.
 HELP
 
@@ -2195,7 +2195,7 @@ HELP
       g_object_unref (color);
 
       node = wrap_in_selection_bounds (node, drawable);
- 
+
       gimp_drawable_apply_operation (drawable, progress,
                                     C_("undo-type", "Lens Distortion"),
                                     node);
@@ -2424,7 +2424,7 @@ sub plug_in_mblur_inward {
     $blurb = 'Simulate movement using directional blur';
 
     $help = <<'HELP';
-This procedure is equivalent to plug-in-mblur but 
+This procedure is equivalent to plug-in-mblur but
 performs the zoom blur inward instead of outward.
 HELP
 
@@ -4058,15 +4058,13 @@ HELP
     {
       GeglNode  *node;
       GeglColor *color;
-      GimpRGB    rgb;
 
       color = gimp_context_get_background (context);
-      gegl_color_get_rgba_with_space (color, &rgb.r, &rgb.g, &rgb.b, &rgb.a, NULL);
 
       node =
         gegl_node_new_child (NULL,
                              "operation", "gimp:semi-flatten",
-                             "color",     &rgb,
+                             "color",     color,
                              NULL);
 
       gimp_drawable_apply_operation (drawable, progress,