Lon's sailors are actually pretty accurate for the pre-1804 period as French ship crews were not issued with proper military uniforms until that year.
Attempts had been made to standardise dress after the French Revolution, particularly in 1794 when a National Assembly decree imposed that each sailor receive a regular issue of clothing in either dark blue, brown or grey. Headgear tended to be a brown or grey stocking cap, though red appears to have been a popular alternative. Chronic shortages of supplies meant that these regulations were often ignored and sailors usually wore civilian clothing on board their ships.
Military uniforms were imposed on the fleet on May 5 1804 with the generalisation of the dark blue
paletot and round hat. Facing colours were introduced in 1808 along with the much hated infantry shako.
Ironically, the first French sailors to receive a proper military uniform where the
Légion Nautique serving in Egypt after the Abukir disaster of 1798. The surviving crews were formed into a legion which crewed light gunboats on the Nile and garrisoned river forts. Later, most of these sailors were absorbed into the regular infantry demi-brigades to make up for losses, and a few even ended up in the Camel Corps. In Egypt, they wore a rather fetching uniform comprised of a short red coatee faced blue and a black round hat (incidentally, the BG French sailors are actually plain sailors rather than
Légion Nautique, though they are advertised as the latter) :
