@DoomsdaysCW
(So many reasons why some of us UFO! fans ignore that Space 1999 ever happened.)
Their purple wigs may* have been trend setters ...
i've seen lots of hair colors not found in nature in music&scifi circles
since about 1999 iirc, so right on time?
[ that time when a hotel tub looked like a crimescene (lovely red washout-dye didn't) ]
* I'd guess Manga had primary-color hair first, but perhaps UFO had it in anglosphere mainstream first?