Lyric discussion by EnduringChill 

Cover art for Indigo lyrics by Peter Gabriel

It sounds to me like someone comtemplating suicide, or simply dying of natural causes. Definitely a song about death. And not a very contented death. The ending lyrics are so sad, despairing...

"But oh how I hate those long nights You understand Darling please, just hold my hand You feel so warm In the eye of the storm I'm going away, I'm going away, I'm going away See you again someday Darling, I'm going away Feel like I'm going away, this time I'm going away."