![]() ![]() ![]() Qualitative: Designed for coding categorical information, i.e., Three types of palettes are derived based on the HCL model: Unbalanced palettes (see rainbow_hcl for further illustrations). Model (a simple transformation of RGB), the three axes areĬonfounded so that luminance changes along with the hue leading to very In contrast, in the more commonly-used HSV (hue-saturation-value) This makes it relativelyĮasy to create balanced palettes through trajectories in this HCL space. To the corresponding gray, and luminance the brightness. Hue is the type of color, chroma the colorfulness compared The resulting three dimensions capture the three perceptual axes very well: (i.e., polarLUV), where steps of equal size correspond toĪpproximately equal perceptual changes in color. Obtained by using polar coordinates in CIE LUV space The HCL (hue-chroma-luminance) color model is a perceptual color model Maximum chroma value in the HCL color description. power, p1, p2Ĭontrol parameter determining how chroma and luminance shouldīe increased (1 = linear, 2 = quadratic, etc.). Palette is registered with that name for subsequent use (within the same session). If set to a non-empty character string, the corresponding Should the color palette vector be returned in reverse order? registerĬharacter. Transparency channel (0 means transparent and 1 means opaque). Numeric vector of values in the range for alpha ![]() Luminance value in the HCL color description. c, c., c1, c2Ĭhroma value in the HCL color description. Hue value in the HCL color description, has to be in. Offsets between the color rectangles displayed. Vector of length 2 indicating horizontal and vertical Should the color be corrected to a valid RGB value? off The number of colors (\(\ge 1\)) to be in the palette. Should the selected HCL color palettes be visualized? n Character indicating type of HCL palette. ![]()
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