Flag of the Malaysian state Johor. FOTW says:
Johore has a blue flag, with a big red canton with white crescent and five-pointed star, pointing somewhere, but not exactly in lower fly end. (…) The flag consists of a white crescent and a star of five points on a red field at the canton and navy blue at the fly. The white denotes a sovereign ruler, red a warrior and blue the universe. This flag is very much associated with the Sultan.
c:special:diff/367316558#Fix Flag of Johor.svg
https://www.mdkt.gov.my/sites/default/files/pekeliling-am-johor-bilangan-2-2018_1_compressed.pdf#page=21
Mrmw, Mike Rohsopht