Claus O. Wilke, Reto Stauffer, Achim Zeileis

Graphical User Interface to Pick Colors in HCL Space


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.


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


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