Poinsettia length. The colored bracts—which are most often flaming red but can be orange, pale green, cream, pink, white, or marbled—are often mistaken for flower petals because of their groupings and colors, but are actually leaves. The colors of the bracts are created through photoperiodism, meaning that they require darkness (12 hours at a time for at least five days in a row) to change color. At the same time, the plants require abundant light during the day for the brightest color. The flowers of the poinsettia are unassuming and do not attract pollinators. They are grouped within small yellow structures
Earliest color films in South India Anilin-Fabrikation (Agfa) and belonged to I.G. Farben since 1925. The Agfa Wolfen plant developed the first modern colour film, with incorporated colour couplers, Agfacolor, in 1936. ORWO Color had caused Tamil cinema to have all films in colour. ORWO Colour was among the cheapest methods at that time (in the late 70s). "Pattina Pravesam", a 1977 film directed K. Balachander, was Tamil cinema's first film to be shot in ORWO colour. Colour films after 1978 were mostly shot in ORWO Colour. It gave a similar colour quality as Eastmancolor. Tamil films in the 80s were all shot using ORWO Colour.