I remember reading a short story (or novella?) that had a girl who was raised by some terrible relatives because her father went missing. She was befriended by an alien who was stranded on Earth and made a device for her that protected her from rape.
When the alien tried to go home, he ended up inadvertently traveling into the past and ended up dying in Italy, leaving her a large inheritance.
I seem to remember a color being a part of the title. I think the alien was enamored with a color found on Earth that wasn’t common where he was from.
I think I read the story in a collection in the mid-1990s.