diff --git a/settings.py b/settings.py
index 7f888e02a814d8ae9e27e54dd4ec51826f55890b..0c5a18b9707becc0be24979f612c6bfb0ddc178a 100644
--- a/settings.py
+++ b/settings.py
@@ -110,6 +110,12 @@ class SverchokPreferences(AddonPreferences):
         default=(0, 0.5, 0.5), subtype='COLOR',
         update=update_theme)
 
+    color_genx = FloatVectorProperty(
+        name="Generator Extended", description='',
+        size=3, min=0.0, max=1.0,
+        default=(0.4, 0.7, 0.7), subtype='COLOR',
+        update=update_theme)
+
     #  frame change
     frame_change_modes = [
         ("PRE", "Pre", "Update Sverchok before frame change", 0),
@@ -173,7 +179,7 @@ class SverchokPreferences(AddonPreferences):
             r = col1.row()
             r.prop(self, name)
         col2 = split.column()
-        for name in ['color_lay', 'color_gen']:
+        for name in ['color_lay', 'color_gen', 'color_genx']:
             r = col2.row()
             r.prop(self, name)
 
diff --git a/ui/color_def.py b/ui/color_def.py
index e68e7d705b19f3e6bf43bbf7a4dbba6d66a5d27d..68cd43f9e3acff4be4d86334cb903d7118a26763 100644
--- a/ui/color_def.py
+++ b/ui/color_def.py
@@ -35,6 +35,7 @@ default_theme = {
     "Scene": (0, 0.5, 0.2),
     "Layout": (0.674, 0.242, 0.363),
     "Generators": (0, 0.5, 0.5),
+    "Generators Extended": (0.4, 0.7, 0.7),
 }
 
 nipon_blossom = {
@@ -43,6 +44,7 @@ nipon_blossom = {
     "Scene": (0.904933, 1.000000, 0.883421),
     "Layout": (0.602957, 0.674000, 0.564277),
     "Generators": (0.92, 0.92, 0.92),
+    "Generators Extended": (0.95, 0.95, 0.95),
 }
 
 
@@ -57,6 +59,7 @@ def color_callback(self, context):
         ("Scene", "color_sce"),
         ("Layout", "color_lay"),
         ("Generators", "color_gen"),
+        ("Generators Extended", "color_genx"),
     ]
     # stop theme from auto updating and do one call instead of many
     auto_apply_theme = self.auto_apply_theme
@@ -79,6 +82,7 @@ def sv_colors_definition():
             "Scene": prefs.color_sce,
             "Layout": prefs.color_lay,
             "Generators": prefs.color_gen,
+            "Generators Extended": prefs.color_genx,
             }
     else:
         sv_node_colors = default_theme