The flag of the state of Perak, in Malaysia, is a tricolour, made of three equal horizontal bands coloured white (top), yellow, and black (bottom). It has a ratio of 1:2.
The stripes on the flag symbolizes the three branches of the Perak royal family. The white stripe represents the Sultan, yellow represents the Raja Muda (the crown prince) and black represents the Raja Di Hilir, which is the next in line after the crown prince. Probably by coincidence, the flag resembles an inverted version of the Russian imperialcolors that was in official use from 1858 to 1917.
The colors of the flag plus red forms the basis of the color used in the Federated Malay States (Negeri Negeri Melayu Bersekutu) flag.