Like we learned in our first year, charms are spells that help people change things for the better. Not transfiguring something, but changing the appearance and size. We could use the charm to help make things look better, like how a metamorphmagus can change their appearance, we can use a charm to change the color of our hair temporarily. It would also be handy to use it to sew apparel and change the colors of old clothes into something more fresh and new.