Question: ETERNAL LOVE (1966)

Why the english title of this Lee Tit's drama contains the word (Colour) after the title? I have the vcd, the chinese characters (七彩胡不歸) are all right. I wonder if this english title is correct...
http://www.hkmdb.com/db/movies/view.mhtml?id=4502&display_set=eng
http://www.hkmdb.com/db/movies/view.mhtml?id=4502&display_set=eng