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.
key=value
The following keys are currently in use:
errorused to highlight the text “error” in error messages
warningused to highlight the text “warning” in warning messages
noteused to highlight the text “detail” and “hint” in such messages
locusused to highlight location information (e.g., program name and file name) in messages
The default value is
error=01;31:warning=01;35:note=01;36:locus=01
(01;31 = bold red, 01;35 = bold
magenta, 01;36 = bold cyan, 01 = bold
default color).
This color specification format is also used by other software packages such as GCC, GNU coreutils, and GNU grep.