True color support

[flying-sheep]

Most terminals (except on OS X) have true color support. crayon should, too

[gaborcsardi]

PRs welcome. :)

[gaborcsardi]

This would be great, but probably won't happen for the next version.....

[romainfrancois]

We could then have viridis progress bar

library(purrr)
library(glue)
library(viridis)

f <- function(){
  v100 <- as.data.frame( t(col2rgb(viridis(100))) )
  text <- glue( "\033[38;2;{r};{g};{b}m=================\033[39m\r", 
    r = v100$red, g = v100$green, b = v100$blue 
  )
  walk(text, ~{
    cat(.)
    Sys.sleep(.1)
  })
  cat("\n")
}

But rstudio does not support the 24 bits scheme so it's not that useful.