The Socks Drawer

The Socks drawer

Robert's Sock Drawer boasts 18 Black Socks,
10 Yellow, 8 Orange, 34 White and 2 Violet,
not sorted by color.

The Light bulb has burned out.
Robert cannot see what color the Socks are.

How many Socks does Robert
have to take to be sure he has
at least two Socks of the same color ?