Cinecolor was a low-cost, two color (red/green) subtractive color process developed in the 1930s and used through the 1950s. It was much less expensive than Technicolor, which was also in wide use at that time. The development of Eastmancolor in the early 1950s eventually put both processes out of business, and left the world with a lot of faded pink prints. Archivists and projectionists curse its name daily.
Poverty Row film production companies such as Monogram were the main customers for Cinecolor. It was inexpensive, but the trade-off was that colors were not as brilliant as Technicolor. The deeper pocketed studios didn’t employ it.
The colors tended toward blue/brown in prints, so were most often used for Westerns. LOVE ISLAND, however, is a B-picture set on a Pacific island, and Eva Gabor’s skin was darkened to make her look like she was born there and not in Hungary! It was passed by the Maryland board of censors.