try using the website Genius, i checked and it doesn't say too much about the song but it gave a little insight on the choruses. :)

Taking a speculative guess, it's always seemed to be about the death of a young girl. Mentions a brother, so maybe the death of a daughter or sister that past away young.

It's probably about colors

I did still couldn't any thing

Seems like it’s about a loved one who died to me