LIBERO UNIFORM RULE: (p. 71) USAV 19.2 (see also 4.3): a. The Libero must wear a jersey that clearly contrasts with, and has a different dominant color from, the jersey of their teammates. b. A jacket or bib can only be worn by the re-designated Libero. If a jacket or bib is worn by the re-designated Libero, the uniform number must still be visible. c. Numbers shall be a contrasting color to the uniform top and meet all other specifications in USAV 4.3.3.1. Color combinations including but not limited to purple/black, dark green/black, navy/maroon, and white/light yellow are not distinctive enough to comply with the rules.  NOTE: The color of the number must clearly contrast with the color of the jersey irrespective of any border around the number. d. When two Liberos are used, both Liberos can be in uniforms different from each other and from the rest of the team. NOTE:  USA Volleyball has set up a review process for questionable uniform combinations.  Clubs with questions about potential sets of uniforms can submit questions/pictures to the Rules Interpreter for review before ordering!  Please allow 5 business days to process your submission.  Go here  to submit your info (please only use if there is a question whether known color combinations are legal).