People in fandoms take apart stories more than English teachers.English Teacher:
The curtains were blue to show the depressing feelings the character was feeling.
The curtains were blue because I like blue curtains...
The curtains were blue because they reminded him of the blue trench coat his best friend used to wear. Because truly, deep down in his heart, he loved that man more than a best friend. He loved him and he completed him. Now that he's gone, all he has to remember him by is those blue curtains.
I JUST LIKE BLUE CURTAINS OKAY! GOD!