A colour picker that 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.
