I had a ponytail back during 6th Form / 1st year at University (way back in the mid-90s...

I feel old

)
Near the end of my first term at uni, I died my hair with a permanent hair dye (Clairol Nice 'n' Easy, IIRC...)... it was a kind of dark reddish colour...(I would have preferred black, but it would have looked even more stupid, given that I'm mousey blonde with fair skin).
After a few weeks or so, it faded... and turned ginger
I promptly had the ponytail cut off*, and then let the dye grow out & went back to natural.
*[And then later ceremoniously burned it while at the pub]