Was it, "Red yellow green red blue blue red purple green yellow orange red red?"
Or. . . "I've got those green with envy blues. . . I mean those red with anger blues. . . ?"
BOTH are from Ludwig Von Drake, as Tigger248 explained, from the first episode of the Wonderful World of Color. The first song I quoted, "The Spectrum Song," is also heard on the Classic Disney CD. The second song, "Green with Envy Blues," is available on the 3 CD-disc set "75 Years."
Paul Frees, also known for his roles as the Ghost Host and the Pillsbury Dough Boy - and not to mention the Burgermeister Meisterburger - provided his voice (originally). Von Drake is now voiced by Corey Burton on the House of Mouse. The Sherman Brothers (song writers of It's a Small World/Journey into Imagination/Winnie the Pooh/Poppins/etc) wrote most of his songs.