General Rulings - 105

• 105.1 - There are five colors in the Magic game: white, blue, black, red, and green. [CompRules 2009/07/08]
• 105.2 - An object can be one or more of the five colors, or it can be no color at all. An object is the color or colors of the mana symbols in its mana cost, regardless of the color of its frame. See Rule 202.2. [CompRules 2009/07/08]
• 105.2a - A monocolored object is exactly one of the five colors. [CompRules 2009/07/08]
• 105.2b - A multicolored object is two or more of the five colors. [CompRules 2009/07/08]
• 105.2c - A colorless object has no color. [CompRules 2009/07/08]
• 105.3 - Effects may change an object's color or give a color to a colorless object. If an effect gives an object a new color, the new color replaces all previous colors the object had (unless the effect said the object became that color "in addition" to its other colors). [CompRules 2009/07/08]
• 105.4 - If a player is asked to choose a color, he or she must choose one of the five colors. "Multicolored" is not a color. Neither is "colorless." [CompRules 2009/07/08]