I don't believe tanning is on topic for this site mainly because it is a cosmetic item rather than one of fitness or nutrition. I haven't heard or seen any other uses for it. I don't have any references, but I've always been under the impression that tanning isn't good for you. I don't believe that you need to be tan to be fit.
When you say:
"Unfortunately a brown tone looks great and makes people more attractive."
it's a subjective beauty standard (generally something of the West, people in East Asia prefer light and white skin) which reinforces the notion that tanning is off-topic. Greg's answer to making abdominals look their best mentions tanning but as a superficial method and one that is not particularly healthy.
There was a question about tanning without getting a burn that was closed. If there is a connection between fitness and tanning, then you should make that clear in the question you want to ask and what your problem and goal actually are.