r-cran-colourpicker 1.0+dfsg-3build1 (amd64 binary) in ubuntu groovy

 This GNU R colour picker can be used as an input in Shiny apps
 or Rmarkdown documents. The colour picker supports alpha opacity, custom
 colour palettes, and many more options. A Plot Colour Helper tool is
 available as an RStudio Addin, which helps you pick colours to use in your
 plots. A more generic Colour Picker RStudio Addin is also provided to let
 you select colours to use in your R code.