Purple is a color similar in appearance to violet light. In the RYB color model historically used in the arts, purple is a secondary color created by combining red and blue pigments. In the CMYK color model used in modern printing, purple is made by combining magenta pigment with either cyan pigment, black pigment, or both. In the RGB color model used in computer and television screens, purple is created by mixing red and blue light in order to create colors that appear similar to violet light.[from wikipedia]

Liatris spicata, the dense blazing star, prairie feather, gayfeather or button snakewort, is a herbaceous perennial flowering plant in the family Asteraceae. It is native to eastern North America[3] where it grows in moist prairies and meadows.[from wikipedia]