The actual colors to be used are configured using the environment variable
PG_COLORS (note plural). The value is a colon-separated list of
pairs. The keys specify what the color is to be used for. The values are SGR (Select Graphic Rendition) specifications, which are interpreted by the terminal.
The following keys are currently in use:
used to highlight the text “error” in error messages
used to highlight the text “warning” in warning messages
used to highlight location information (e.g., program name and file name) in messages
The default value is
01;31 = bold red,
01;35 = bold magenta,
01 = bold default color).
This color specification format is also used by other software packages such as GCC, GNU coreutils, and GNU grep.