Lyric discussion by tofuman 

I don't read so deep into it like you guys, but I think the song's just simply about opening your heart up fully to someone you love, running the risk of breaking it. That's what I got from the music video. Like when she protects her heart by not giving it to anyone fully, and her world is all black and white. But finally one day she decides to give it to someone and her world is full of colors.

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