Apple
Apple's color palette is one of extreme sophistication and minimalism. The company uses pure black and gray as its primary brand colors.
Black is a powerful color that, in many cultures, symbolizes luxury, elegance, and high ranking. And let's not forget Steve Jobs's signature black turtleneck! Gray is a neutral color — one can compare it to a dispassionate agent between black and white. It symbolizes intellect, wisdom, and dignity.
Pro Tip: Use black and gray for software and programming industries as they represent trustworthiness and security.