"President Barack Obama at the memorial service for Tuscon shooting victims on January 12 and at the White House State Dinner for Chinese President Hu Jinato on January 19. Photos: Kevork Djansezian/Getty Images | Alex Wong/Getty Images"
I know at times, a person may contemplate color because of maintenance, cost, time, etc. Look at what a great difference this made for even the President! (I did not color Mr. President's hair myself, so I can't specifically 100% say it is colored, but you are seeing the same photo that I am.)
Men, women, teenagers (preferably above the age of 12) - anyone and everyone can have fun coloring their hair. Hair is supposed to be versatile and you can always change it. Hair is an accessory and it helps to compliment who you are and your personality. Don't be afraid to show it and step out of the gray zone!