The Jewish Autonomous Oblast is situated in the Far Eastern Federal District of Russia. Its flag consists of a rainbow on a white background, with seven narrow horizontal colored stripes: red, orange, yellow, green, sky blue, blue and purple. The number of colors is meant to symbolize the seven-branched Jewish Menorah. The flag's aspect ratio is 2:3. The seven colored stripes are centered vertically and regularly spaced; they have a height each equal to 1⁄40 of the total flag's height, and are separated by a thin spacing equal to 1⁄120 of the total flag's height.The rainbow flag design was adopted in October 1996.
Source: Wikipedia