Olive is a dark yellowish-green color, like that of unripe or green olives.
As a color word in the English language, it appears in late Middle English. What were the colors Crayola produced during their initial couple of years, say 1903-1905? According to their ad they had thirty different colors in their production. Again, the reality was that they had a few more. The difficulty with researching their original color palate was that none of their documentation (ad, pamphlets or catalogs) lists their colors. However, the flagship box on their Crayola line, the No 51 assortment, olive green featured.
Since the No. 51 box had only 28 colors and that isn’t the 30 that the ad mentions, we have to look across all the other boxes from the original Crayola line up.
It contained Black, Burnt Sienna, Burnt Umber, Green Dark, Green Light, Green Medium, Cobalt Blue, English Vermilion, Flesh Tint, Gold Ochre, Indian Red, Light Yellow, Yellow Medium, Olive Green, Orange, Prussian Blue, Purple, Permanent Magenta, Raw Umber, Rose Pink, Ultramarine Blue, Venetian Red, White.