There are five colors in Magic: white, blue, black, red, green. If something asks you to choose a color, those are your only choices.
'Colorless', like 'monocolored' and 'multicolored', is defined by how many colors that object has; colorless means 'has no color', monocolored means 'has exactly one color', and multicolor means 'has two or more colors'.
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.”
«Dystocracy : A system of government in which corrupt leadership colludes with dishonest bankers and greedy elites in order to ensure that productive members of society –people who actually do useful work- bear the greatest share of taxes while gaining the least benefit possible.»