Red was the colour of her lips when she made the first move and kissed him, and the colour of the imprint she left around his mouth.
Red was the colour of his scars, constantly whispering to himself that he didn't deserve her.
Red was the colour he saw every full moon, blinding him with unexplainable rage and removing his control over himself.
Red was the colour of her blood, dripping from her from a cut inflicted on her by Bellatrix Black, in one fateful battle.
Red was the colour of their pain.