CentralNotice From Wikipedia, the free encyclopedia Jump to: navigation , search This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed. (February 2011) ( Learn how and when to remove this template message ) The line of purples circled on the CIE chromaticity diagram In color theory , the line of purples or the purple boundary is the locus on the edge of the chromaticity diagram between extreme spectral red and violet . Except for the endpoints, colors on the line of purples are not spectral. Line-of-purples colors and spectral colors are the only ones which are considered fully saturated in the sense that for any given point on the line of purples there exists no color involving a mixture of red and violet that is more saturated...