Fifth Republic
Who & why: the constitution of the Fifth Republic names the flag in its Article 2: the national emblem is the tricolour flag, blue, white, red (Wikipedia, quoting the article; Flags of the World, citing the Société française de vexillologie, gives the same wording for 1958). The shade of the blue has moved: President Giscard d'Estaing had it lightened in the 1970s (1974 in Wikipedia and the SFV, 1976 in a Flags of the World contributor), and on 13 July 2020 the Élysée Palace went back to the darker navy, without an announcement and without orders for other institutions.
What it represents: the same blue-white-red tricolour whose order the Convention fixed on 15 February 1794 — blue at the hoist, white in the middle, red at the fly. The 1958 text does not set a shade, and the swatches below are approximations of the commonly shown colours, not a specification.
Wikipedia says the constitutions of 1946 and 1958 named the blue, white and red flag as the national emblem, quoting Article 2 of 1958: «the national emblem is the tricolour flag, blue, white, red»; that President Giscard d'Estaing introduced a lighter blue in 1974; and that on 13 July 2020 President Macron reverted the Élysée Palace to the darker hue without a statement. FOTW, citing the Société française de vexillologie, gives the same Article 2 wording for 1958, 1974 and 1976 for the lightening (Sache gives 1976), and 13 July 2020 for the darker blue, which it says was not officially announced and was mainly seen on state buildings.
- Flag of France — Wikipedia compiled
- France — Flags of the World (CRW Flags) compiled
Not established: The sources date the lightening to 1974 or 1976. Neither names a shade, so the swatch colours are approximations. This is a start-year check only for the constitutional text; the flag itself dates from 1794.