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
Amaranth (color) color of the flower of those amaranth plants that have "amaranth red" colored flowers. The first recorded use of "amaranth" as a color name in English was in 1690. The name "amaranth" comes from the Greek "a" (not) + "marainean" (to waste away), i.e., a flower believed to grow on Mount Olympus which never died. The color amaranth pink is displayed at right. This color is a representation of the color of pink amaranth flowers. The first recorded use of "amaranth pink" as a color name in English was in 1905. The Crayola crayon color radical red is displayed at