In Indian weddings in general, Henna is very very important. And it is said that the darker it is, the more your husband loves you.
This belief, while known to be a mere superstition, is still venerated and guarded as paramount to the success of a marriage. So much so, that there are articles and tips in Indian wedding magazines and blogs as to how to obtain a darker stained Mehndi. Some brides, Mayuri mentioned, go so far as to bleach the skin around their upper and nether limbs in order to have the henna stand out more from their skin and appear darker.