blue dryer drums come from COLD washes....color may not be removed/faded during a cold wash, but will transfer to dryer during use....
first clue to the condition of the washer, is to open the dryer door....if the drum is blue, chances are the washer is going to need some serious cleanout of scum and build up...
I wash a lot of jeans, sometimes use downy, and have the whitest drums....then again, its always a warm or hot wash as well....