Checks if the color is specified by the block object in which the object is contained (color method of this color is set to "kByBlock", or it is set to "kByACI" and ACI color method is "kACIbyBlock").

true if the color method of this color is set to "kByBlock", or if it is set to "kByACI" and ACI color method is "kACIbyBlock", false - otherwise.