I’ve had a number of guests request our paint colors, and have had three guests share after photos. Our bathroom wall color is a made up mix of two colors. One guest asked me to FedEx her a paint stick with the color, and she sent me a pic of her finished office. I thought that was over the top, but she said she had been looking for six months for the perfect (for her) blue.
It seems silly, but some guests get attached to colors when they have had an opportunity to test drive them in a rental.
I’ve never had a guest actually comment on paint colors in a review, though.