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.
Definition of regime. 1  1a : regimen 1b : a regular pattern of occurrence or action (as of seasonal rainfall)c : the characteristic behavior or orderly procedure of a natural phenomenon or process. 2  2a : mode of rule or managementb : a form of government a socialist regimec : a government in powerd : a period of rule.