diff --git a/manimlib/mobject/mobject.py b/manimlib/mobject/mobject.py
index 5ea02ee6..d83dccc7 100644
--- a/manimlib/mobject/mobject.py
+++ b/manimlib/mobject/mobject.py
@@ -714,7 +714,7 @@ class Mobject(object):
                 for rgb, o in zip(*make_even(rgbs, opacities))
             ])
             for mob in self.get_family(recurse):
-                mob.data[name] = rgbas
+                mob.data[name] = rgbas.copy()
         return self
 
     def set_color(self, color, opacity=None, recurse=True):