Hmmm... possibly ....does Chloe have tattoos like that on her arm ?
It looks like henna, which is a type of temporary tattoo found in India. I had henna painting done on my hand once and it lasted for about two weeks before I had to wash it off. (But it depends on how often you shower/wash your hands. Since I had a piano recital, I had to scrub my hand like crazy until it faded, so it would have lasted longer had I not done that.)