A/N: I don't own Harry Potter or any related characters
Word count: 335
"Don't smile, it's not funny," Hermione said, putting her hands on her hips. Fred laughed loudly.
"It is actually. I mean, no, it's horrible the product did that," he corrected himself, his eyes still sparkling as he looked at Hermione's now neon green hair. She glared at him.
"You're going to fix this."
"Right, right, let's see, should have something to counteract it, but you know, the green looks lovely with you skin!" Fred said, ducking as Hermione threw something at him.
"Why do I keep doing this, helping you with these inventions?"
"Because you love me?" Fred suggested, holding up a vial full of shimmering plum colored liquid. "Found it!"
"Hand it here, and it had better not turn my hair purple!"
"It won't," Fred promised, crossing his fingers behind his back. It shouldn't turn her hair purple, but then again, the first product wasn't supposed to turn her hair green either. He watched her drink it, slowly the tips of her hair darkened back to their usual color. Within a minute, Hermione's hair was completely back to normal. She sighed, setting the vial down.
"Guess we should probably mark that as a failure, unless you want to market it as something to turn one's hair green?"
"I might, be kind of funny actually. Wonder if I can get it to do other colors, can you imagine Snape with neon pink hair?" Fred asked, causing Hermione to roll her eyes.
"He'd murder you in your sleep and not leave a trace. Best be leaving him alone, now... Ron on the other hand...maybe a brilliant blue?" Hermione suggested, raising an eyebrow at Fred.
"Yes! Come on, let's see if we can get it to work like that."
"Just as long as I don't have to be your guinea pig again," she said.
"Nah, I'll invite Ron over in a bit, promise him food, he'll never turn that down," Fred answered, already starting to brew the potion he'd used in the product.