Ggplot - Color

About

Colour is an aesthetic (plot parameter) that changes the bar outline color.

See also:

  • fill to change the interior colouring.
  • alpha for the transparency

Format

Name

A name, e.g., “red”. R has 657 built-in named colours, which can be listed with colours(). The Stowers Institute provides a nice printable pdf that lists all colours.

Rgb

An rgb specification, with a string of the form “#RRGGBB” where each of the pairs RR, GG, BB consists of two hexadecimal digits giving a value in the range 00 to FF

You can optionally make the colour transparent by using the form #RRGGBBAA

Transparent colour (NA)

An NA, for a completely transparent colour.

Documentation / Reference


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