Quick answer
Indonesia’s flag is a 2:3 horizontal bicolour divided into two equal bands, red above white.
Specification
Article 4 of Law No. 24 of 2009 defines a rectangle whose width is two thirds of its length. The upper half is red and the lower half is white, with both sections equal in size.
Hoist : fly2 : 3
Horizontal bands2 equal
Band heights1 : 1
OrderRed / white
Display colors
Red
HEX #FF0000 / asset screen valueWhite
HEX #FFFFFFConstruction notes
The dividing line lies at half the hoist, parallel to the upper and lower edges. With no emblem or border, the complete construction is determined by the 2:3 rectangle and the equal horizontal division.
Historical record
The red-and-white flag was raised at the proclamation of Indonesian independence on 17 August 1945. Article 35 of the Constitution identifies the national flag as Sang Merah Putih, while the 2009 law supplies its detailed form and rules of use.