All sources I have gone through , say the Gloss Navy Blue , FS 15042 what is the ANA623. The equivalents can be the Humbrol 181 or just the Gunze H54. Other equvalents :
Pactra: A120 Dark Sea Blue FS15042
Testors/ModelMaster: 1717 Dark Sea Blue FS15042
Gunze: C365 Gloss Seablue FS15042
The French name for the colour was the Blue Marine ( Gloss Navy Dark Blue ) .