His mouth opens and closes wordlessly.
"Pur-ple. Purple." Sirius sounds breathless, as though he is being strangled. His eyes are transfixed on the mirror he holds in his unsteady hand.
Surely the person reflected is not him? He can't believe it. He won't.
Sirius gulps.
"Sirius I- Oh, Merlin. Sirius, your hair! It's-"
"Don't say it!"
"Purple. What did you do?" If Remus sounded worried before, he certainly doesn't now. He resembles quite strongly a cat that has just caught a canary.
"It was all James!" Sirius cries, forlorn. He catches Remus' raised eyebrow.
"No, seriously, this time it was!"