Looks like we were both wrong
http://www.songmeanings.net/songs/view/18392/Baby, I compare you to a kiss from a rose on the grey
Ooh, the more I get of you the stranger it feels, yeah
Now that your rose is in bloom
A light hits the gloom on the grey
I looked on a few other sites and confirmed it, although I prefer your version
A lot of interesting drug metaphors I missed being 11 when I first heard it. Apparently "kiss from a rose" is a symbolic of shooting heroin and there's a lot of debate on that site about whether it's love of drugs or a women that is discussed
For Convenience:
https://www.youtube.com/watch?v=OidptfcdkI4