Unexpected color error with CSS shorthand hex

[jat255]

In some existing (previously working) code, we got an error after updating GT to 0.3.1, that I think is a regression introduced by #787.

Using shorthand hex codes for colors results in an error:

tab_style(
      style = list(
        cell_text(weight = "bold",
                  color = "#555")
      ),

Gives the following error:

WARN [2021-09-23 16:54:48.776] Error in : An invalid color name was used (`"#555"`):
* Only R/X11 color names and CSS 3.0 color names can be used - function (m) { logger::log_warn(m$message) }
Warning: Error in : An invalid color name was used (`"#555"`):
 * Only R/X11 color names and CSS 3.0 color names can be used
  1: shiny::runApp

This is easy to workaround for the time being (just change to full hex colors instead), but thought it was important to report, as those are valid CSS color identifiers.

[rich-iannone]

We didn't yet implement short hexadecimal color codes but we've certainly thought about it. Seeing that it's being used makes us definitely want to make it work now. Thanks for reporting!