An electrophoretic ink includes fluid having either (a) at least two sets of differently colored particles with the fluid been a substantially clear fluid, or (b) at least one set of colored particles with the fluid been a differently colored fluid than the colored particles, wherein at least one set of colored particles includes at least one electrophoretic particle having a core-shell structure. The at least one electrophoretic particle includes a shell and a core located within the shell, wherein the core includes a colorant and a fluorescent compound. An electric field may be applied adjacently to the fluid of the ink, and the at least one set of colored particles having the core-shell structure is movable within the fluid of the ink by the electric field.