Camouflage paints of Spanish Republican planes of the Civil War
 

name of paint	indicative chip	match	typical use	notes
Spanish olive green  (or AII green?)			Found on an I-16	see here
Spanish light blue  (or AII blue?)			Found on an I-16 (over a layer of grey-blue)	see here
Dark green			Found on a SB over AE-9 underlying
Spanish light olive green			Found on a SB overposed to the darker green; possibly utilized for disruptive camo.
Spanish markings red			Found on an I-16 and on a RWD tail	see here and here
Spanish ochre yellow			found on an RWD tail both as camo and flag color.	see here
Spanish markings purple			found on an RWD tail as flag color	see here

Note: thanks to Isaac Montoya for the samples of greens, red and light blue. Note that existing exhibits are very few, and could be not representative of all planes.