Purple Haze

Purple Haze is one of Jimi Hendrix's most well known songs. A psychedelic classic, it could even be considered important in pioneering stoner metal. While it has never been proven, it could be inferred that the "purple haze" in question is LSD as the entire song is about the substance making him act, feel, and see abnormally. The song is a classic rock staple. Despite its popularity over the decades, it did not chart well, likely due to concerns over drug-based songs at the time.

trivia
The song is noted for being the subject of the most famous mondegreen of all time: "Scuse me while I kiss this guy". The actual line is "Scuse me while I kiss the sky". A misheard lyric website has since been created called "Kiss This Guy".