Deprecated on 2019-01-12.
drake_palette()There is a console message,
but the actual return value is NULL.
This function is
used in both the console and graph visualizations.
Your console must have the crayon package enabled.
This palette applies to console output
(internal functions console() and
console_many_targets()) and the node colors
in the graph visualizations.
So if you want to contribute improvements to the palette,
please both drake_palette() and
visNetwork::visNetwork(nodes = legend_nodes())