Based on the 'Harley Quinn Arkham Outfit' mod by @dantethedarkprince. This mod isolates and tweaks the corset to be its own standalone top and makes the base and accent colors RGB adjustable.
Currently does not look well with overly large breasts but I remember there being a way to make...
There is also a vanilla version of this costume available. Users are generally advised to use vanilla files whenever possible, because these files have superior compatibility and will unload more cleanly.