Make my skin get back to its original color?

i normally would have a light tan ( almost khaki like ) skin color. however, living in hawaii, my skin has gotten really really dark, almost like a philipino or indian or southeast asian person. not that thats bad, but it makes me look really different from my other family members who dont go to the beach a d play as many sports as i do. i know my "original" skin color from old pictures and from the fact that my thighs up to my lower back (where my pants cover) is a totally lighter color than the rest of my body. what can i do to lighten and even out my skin tone?