I was not aware of the blue, but was of the black wrinkle and grey hammertone. I opted for the black wrinkle as I like the look better then the grey hammertone.
BTW, both finishes are available from Rust-O-Leum that was at my local Home Depot. That said, their Hammered finish is good, but the black wrinkle will most likely require some heat to get it to wrinkle good. I've had one that I bought at a local parts store called VHT Wrinkle Plus that worked very good without any additional heat.