Color > Toggle Display
Colors Attribute
Toggle Display Colors Attribute turns the Display Colors attribute (located in the Mesh Component Display tab of the shape node) on or off for the currently selected polygon mesh.
Turning on the Display Colors attribute lets you view the color per vertex information as well as any assigned shaders on a polygonal mesh when the display is set to shaded mode. The default Display colors setting for any object is off until color per vertex information is applied.
If you do not want to view color per vertex information for any new polygon objects in your scene while viewing in shaded mode, turn Toggle Display Colors Attribute off.