Flags with Solid Fields

A solid-field flag is the simplest possible vexillological statement: a single block of color, sometimes carrying a central emblem, with no stripes or divisions to break the field. The simplicity is intentional.

A single dominant color reads at any distance, resists confusion with neighboring nations, and gives a central symbol — a sun, a crescent, an eagle, or a written inscription — maximum visual weight. Japan's white field with a single red disc, adopted in 1870 and reaffirmed in 1999, is the clearest expression of this idea.

Several of the world's most recognizable flags fall in this category. China's red field with five gold stars, adopted in 1949, sets the smaller stars in orbit around a larger one to symbolize the people united around the Communist Party.

Saudi Arabia's green flag carries the shahada in white Arabic calligraphy and is treated as so sacred that it is never flown at half-mast. Switzerland's square white cross on red — one of only two square national flags in the world — and Vietnam's red flag with a single yellow star round out a category that proves restraint can carry as much meaning as elaboration.