this is a folk/rock song from the 60-70s, with some really unusual chording. i've searched every key word i can think of, but get loads of other songs. words are something like: "when the deep purple falls over sleepy garden walls, and the stars begin to twinkle in the night, in the midst of my memory, you wander on back to me, breathing my name with your sighs."

chorus has the line "in my deep purple dreams"

any help appreciated