Vostoria is composed of three autonomous republics: Vostokkia, Misim, and La Moria. Those three republics are represented by three blood red stars, placed equidistant from each other and the central crown, symbolizing union under the Vostorian Crown. The background is a Canadian Pale (vertical tribar where the middle is twice the length of the other two bars. It is bicolor, with the middle being black to represent New Vostokkia, and the edges being black to represent La Moria. Additionally, these colors also stand for prosperity and determination, respectively. TL;DR, in cool vexillogical terms: orange and black bicolor Canadian pale, charged with a crown and three equidistant red stars.