The music was written first. Pete Brown's first attempt at a lyric was something about a "doomed hippie girl" - the song was called "Cinderella's Last Goodnight." Jack Bruce wasn't buying it, so he scrapped that idea and pulled up an eight-page poem he had written earlier, which he reworked into "White Room."
In a Songfacts interview with Pete Brown
, he told the story: "It was a meandering thing about a relationship that I was in and how I was at the time. It was a kind of watershed period really. It was a time before I stopped being a relative barman and became a songwriter, because I was a professional poet, you know. I was doing poetry readings and making a living from that. It wasn't a very good living, and then I got asked to work by Ginger and Jack with them and then started to make a kind of living.
And there was this kind of transitional period where I lived in this actual white room and was trying to come to terms with various things that were going on. It's a place where I stopped, I gave up all drugs and alcohol at that time in 1967 as a result of being in the white room, so it was a kind of watershed period. That song's like a kind of weird little movie: it changes perspectives all the time. That's why it's probably lasted - it's got a kind of mystery to it."