Pretty Colours Purple Blue

I love this flower, whatever noxious weed it may happen to be, what other flower would have green and blue flowers on the same plant as these purple and pink ones? Aren't they darling? I want it so bad. I want to grow it in a hanging basket somewhere. And then watch in despair as the damned thing takes over my entire garden. At least for a few weeks while it flowers I'd be happy about that.