Space Creator: Improve colors of nested functions

misc/space-creator/default_colors.json

@@ -91,12 +91,12 @@
             "pen_width": 3
         },
         {
-            "brush_color0": "#ffcecece",
+            "brush_color0": "#ffdbe6e0",
             "brush_color1": "#ffffffff",
             "color_type": 10,
-            "fill_type": 1,
+            "fill_type": 0,
             "group": "IVE",
-            "pen_color": "#ffababab",
+            "pen_color": "#ffc7c7c7",
             "pen_width": 1
         },
         {