President Emmanuel Macron has switched to using a darker navy blue on the official French flag, replacing the previous brighter shade, officials have told local media, reports the BBC.
The move saw flags in the new hue hoisted on the presidential palace last year without any accompanying fanfare.
Mr Macron wanted to bring back the navy blue flag, a symbol of the French Revolution, Europe 1 said.
However, both the darker and lighter flags have been in use for decades.
France's navy and many official buildings around the country have always used the navy blue shade.
But in 1976 under President Giscard d'Estaing, the French state introduced a brighter blue on the tricolour to match the blue on the flag of Europe.