# NO_COLOR

Added in version 4.1.

This is a CMake Environment Variable. Its initial value is taken from the calling process environment.

Set to a non-empty value, other than `0`, to tell command-line tools not to print color messages even if connected to a terminal. This is a common convention among command-line tools in general.

See also the `CLICOLOR_FORCE` and `CLICOLOR` environment variables. If `NO_COLOR` is activated, it takes precedence over both of them.

See the `CMAKE_COLOR_DIAGNOSTICS` variable to control color in a generated build system.