LOL. I went and typed "cant" just to see if there's any other map that did the same thing.
Only one map did this: https://osu.ppy.sh/b/888010
that fact makes me feel something but i dont know what
i would probably expect to find a word for it on http://www.dictionaryofobscuresorrows.com/
I think you could make sliderborder and slidertrack colors consistent for all diffs... (It's only different for Oko's Extra atm...)