Low bf will do the opposite as long as u got decent bones.I am quite bloated atm so I think with low % it will be exposed even more ?
This is the highest likely answer. OP had braces/extractions I'm assuming, it's incredibly common for people who had these things to have said dark circles because of the downward growth. This is because the maxila (the bone in the face area where your midface is) is retruded and not forward grown, and so the area beneath the eyes get no support, and the thin skin around the eye becomes darker looking.I have this too. I think it's caused by having a flat under eye area. If it's forward grown it shouldn't be that purple.
If you're not ready for fillers get some color corrector and concealer