Hello, the bleu coat with white coton trousers and jacket belong until 1913-14. at this date (1913)in marrocco, the FFL where "light khaki" coton trousers and jacket like "troupes coloniales" (= marines) with pith helmet pattern 1886, dyied khaki.For Gallipoli, the legion came with dark blue coat with khaki coton dress and pith helmet. the "bleu horizon" dress came middle of 1915 and khaki wool dress at the begenning of 1916. The pattern 1901 coton khaki dress belong until 1920-30.
regards
paco