Chroma indicates how bright, saturated, vivid or colorful a color is. Formally, for any given color, reducing chroma to zero produces a gray of the same value. The maximum chroma for the color will vary with the color and the medium (display vs. print, for example)
On a display, the high chroma colors are vivid and bright, and unfortunately, the easiest to select in many applications. Using colors that are darker and grayer, or more pastel (closer to white), has many benefits.
Interactive systems and algorithms to guide color choices also exist, but they do not consider semantic associations between data values and colors. Prior work has optimized color mappings based on spatial frequency [BRT95], perceptual visibility [LSS12], color harmony [WGM08], and display energy consumption [CWM09]. Rheingans and Tebbs [RT90] introduced a tool allowing users to manipulate color mappings to visually explore and ﬁlter data. Lastly, other work has focused on generating palettes for artistic rather than visualization applications [MSK04,OAH11].
January 17, 2006