Hi Clint. Non-standard but not unusual (SOP250 had a few similar), the early schemes were simpler than the later 4/5 colour probably just green / light or dark brown patches on the unpainted fabric. Looks like 3-colour.
On the subject of identification these colour Escadrille emblems may be of help in the future.....
https://www.traditions-air.fr/unit/photo/classeurvi.htm
Nick