It actually started with the game show and everyone else followed suit. Popularized by Nickelodeon, at least in the US, and I think aligned with the 'Neon Era' we all experienced in the mid 80s. This color along with that orange color that makes you feel like your brain is bleeding is something I recall being everywhere for awhile. Eventually it expanded out into every highlighter color possible, then sometime around the slap bracelet just poofed out of existence in favor of future blacklight purple and chekov radiation blue.