"All the leaves are brown, and the sky is grey" are lyrics in the 1965 song "California Dreamin'" which was first recorded by Barry McGuire. However, the best-known version is by the Mamas and the Papas, who sang backup on the original version.

"California Dreamin'" is a song written by John Phillips and Michelle Phillips. The song has become No. 89 in Rolling Stone's list of the 500 Greatest Songs of All Time. The lyrics of the song express the narrator's longing for the warmth of Los Angeles during a cold winter in New York City.

The song "California Dreamin'" is now considered is one of the all-time sunniest songs of longing.

More Info: en.wikipedia.org