Apple originally released the MacBook in 2006 as a follow-up to various iBook laptop iterations. The MacBook was the first laptop to use the MagSafe connector, a power connector that attached to the laptop with a magnet that easily broke free to prevent the power cord from pulling the laptop off a table or a lap.
The first-generation MacBook was made of polycarbonate and was available in glossy white or matte black.
I own both a black and white version of the first-generation MacBook. To purchase it new, the black model was just over $100 more than the white version for no other reason than it came in black. At the time, all other Mac models were white or silver.
Source: EveryMac
