Possibly convert colours to a function like `colors()`, and make scales easier to use with dedicated `scale_` functions like: [scale_viridis](https://github.com/sjmgarnier/viridis/blob/master/R/scales.R) See #1.
Possibly convert colours to a function like
colors(), and make scales easier to use with dedicatedscale_functions like: scale_viridisSee #1.