That line is no where related to the storyline, it is a simple copy from a movie song, but since the TM asked we just started discussing, the makers wouldn't have given a second thought to thisOriginally posted by: -Ishqbaaaz-
Doesnt a rainbow have 7 colours from red, orange, yellow, green, light blue, darker blue to purple?
To me the meaning of that line means together they are complete like a rainbow.