Arabic mehndi designs have been around for a couple of years now. The vegetable-based colors are especially popular with brides since they come mixed with a little glitter. Once the mehndi designs are in place, they have a soft shimmer – extremely attractive on the back or upper arms! If you are using henna with chemical dyes, you might have an allergic reaction. Experiment on a small area of skin well before the wedding to see if it suits you.