Red Death
Blue is the color of her eyes and Erik always thinks he's never seen anything more beautiful. When she smiled up at him that night after she kissed him he thought he could happily die right then as long as she didn't look away.
Red is the color of roses left on dressing room tables; fresh and blooming, heavy with perfume and always with the thorns cut off so she doesn't prick her fingers. Everyone else sends pink roses, but Christine loves the red ones most of all because they come from him.
Gold is for the Paris Opera House, with its elaborate statues and huge marble staircase. When Erik first arrived he thought it was the most beautiful building he'd ever seen on the inside. When Christine first arrived she thought it seemed like the sort of place an angel would live, and she found out later how true that was.
Blue is the color of the ocean beneath the pier, despite the darkness. The waves that slowly lap up on the sand are quiet, but in the silence of grief they seem as loud as cannon fire. The water looks unnaturally blue from the lights of the nearby park as drops splash up onto the pier, and perhaps this is a good thing since now Erik can't tell which drops are the ocean's and which came from his eyes.
Red is the color of blood, slowly seeping into the wood and staining Erik's hands as he frantically tries to stop the bleeding through sheer force of will, despite the fact that he knows it's too late. It's the dampness on her hands which she had pressed to her stomach in a moment of surprise and now has wrapped in the lapels of his jacket. Red is the front of her dress, and now his shirt, but he doesn't even notice, let alone care.
Gold is the color of the wedding band on her finger, placed there ten years ago with so many hopes and dreams now long shattered. And as it slips off her finger and falls into the ocean, the gold continues to sparkle as it's slowly buried beneath the sand and forgotten.
AN: Not sure what I was going for here, either... it just kind of popped into my head and I thought it was poetic.