color Most programs in the PostgreSQL package can produce colorized console output. This appendix describes how that is configured. To use colorized output, set the environment variable PG_COLORPG_COLOR as follows: If the value is always, then color is used. If the value is auto and the standard error stream is associated with a terminal device, then color is used. Otherwise, color is not used. The actual colors to be used are configured using the environment variable PG_COLORSPG_COLORS (note plural). The value is a colon-separated list of key=value 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: error used to highlight the text error in error messages warning used to highlight the text warning in warning messages note used to highlight the text detail and hint in such messages locus used 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.