Some of Stephen Sondheim's SUNDAY IN THE PARK WITH GEORGE (1986), especially "Finishing the Hat".

Some of DARLING OF THE DAY (Jule Styne - E.Y. "Yip" Harburg, 1968), especially "I've Got a Rainbow Working For Me". Harburg managed to put a rainbow into almost everything he wrote (Oz, ...Paper Moon, Finian, etc).