* Blonde: From platinum to golden to strawberry blonde.
* Light Brown: Often referred to as "dishwater blonde" or "dirty blonde" when lighter.
* White/Gray: While technically the absence of pigment, white or gray hair stands in contrast to dark hair due to its brightness.
* Red/Ginger: Although some shades of red hair can be quite dark, the characteristic red undertones and generally lighter overall appearance contrast with the coolness of dark brown or black hair.
So, while there's no single "opposite" shade, light hair is the general antonym of dark hair.