Microsoft

Blue, green, yellow, and red — wait, aren't those Google's brand colors? Well, not exactly. Similar to Google, Microsoft also took 3 primary colors (but of different shades) with the addition of green and gray.

Many global brands like Google, Microsoft, eBay, and Apple (before their redesign in 1998) chose these colors for a reason. Rainbow colors perfectly complement each other and create a sense of openness, diversity, and optimism. Plus, they're vibrant and hard to ignore.