The app visualizes colors either along the hue-chroma plane for a given luminance value or along the luminance-chroma plane for a given hue. Colors can be entered by specifying the hue (H), chroma (C), and luminance (L) values via sliders, by entering an RGB hex code, or by clicking on a color in the hue-chroma or luminance-chroma plane. It is also possible to select individual colors and add them to a palette for comparison and future reference.

hcl_color_picker(shiny.trace = FALSE)

choose_color(shiny.trace = FALSE)



logical: used for debugging the shiny interface.


hclcolorpicker invisibly returns a vector of colors choosen. If no colors have been selected NULL will be returned.


choose_color is a convenience alias for hcl_color_picker to go along with choose_palette. Another alias is hclcolorpicker.


Zeileis A, Fisher JC, Hornik K, Ihaka R, McWhite CD, Murrell P, Stauffer R, Wilke CO (2020). “ccolorspace: A Toolbox for Manipulating and Assessing Colors and Palettes.” Journal of Statistical Software, 96(1), 1--49. doi: 10.18637/jss.v096.i01

See also


Claus O. Wilke, Reto Stauffer, Achim Zeileis


if (FALSE) { hcl_color_picker() }