RED OCEAN AND A BLUE OCEAN

The "ocean" refers to the market or industry. "Blue oceans" are untapped and uncontested markets, which provide little or no competition for anyone who would dive in, since the markets are not crowded. A "red ocean", on the other hand, refers to a saturated market where there is fierce competition, already crowded with people (companies) providing the same type of services or producing the same kind of goods.