What is a color set in monopoly?

In Monopoly, a color set refers to a group of properties that are all of the same color, which players aim to acquire to build houses and hotels. Each color set consists of multiple properties, and owning all the properties in a set allows the player to charge higher rent when opponents land on them. For example, the brown color set includes Baltic Avenue and Mediterranean Avenue. Completing a color set is a key strategy for maximizing income and dominating the game.