One can make a color-color plot by arranging stars in a two-dimensional graph, where each axis measures a different color index. Below are some examples from the SDSS, which uses a set of broadband filters called (u, g, r, i, z); they are very roughly equivalent to (U, B, R, I, _).
regime - the organization that is the governing authority of a political unit; the government reduced taxes; the matter was referred to higher authorities. authorities, government.
also rÃ©Â·gime (rÄ-zhÄmâ², rÄ­-) n. 1. a. A government, especially an oppressive or undemocratic one: a fascist regime. b. A usually heavy-handed administration or group in charge of an organization: Raises were canceled under the new regime.