purple but green, beans

it was raining yesterday at the farmer's market. big drops that actually hurt, if you look up for some reason, and they hit your eyes.

the only beans I found were these. they were labeled, "green beans $4.00/pound"

of course they are purple. I wonder if they will get darker after being bubbled around in boiling water for a bit. I'm curious. with a little trepidation. as I prefer vegetables to stay of the standard variety, and fit their name. call me old fashioned. or...boring.

Update: when you drop the purple beans into boiling water, the purple instantly disappears. and they become...dark green beans.