Corally can't seem to make up its mind on what color it wants to anodize things. There's a light blue and a darker blue... both are duraluminum. The steel ones (which I highly recommend) are black. I haven't bent a steel one in a year since I switched. Good stuff.
To be certain, weigh them. The steel ones should be heavier, and the two you've got should weigh the same as the one you bent.