honor the NO_COLOR env var

README.md

@@ -97,6 +97,8 @@ complete (and more colorful) variants, see
 [here](https://github.com/seebi/dircolors-solarized) or
 [here](https://github.com/trapd00r/LS_COLORS).
 
+`fd` also honors the [NO_COLOR](https://no-color.org/) environment variable.
+
 ## Parallel command execution
 If the `-x`/`--exec` option is specified alongside a command template, a job pool will be created
 for executing commands in parallel for each discovered path as the input. The syntax for generating

src/main.rs

@@ -143,7 +143,7 @@ fn main() {
     let colored_output = match matches.value_of("color") {
         Some("always") => true,
         Some("never") => false,
-        _ => atty::is(Stream::Stdout),
+        _ => env::var_os("NO_COLOR").is_none() && atty::is(Stream::Stdout),
     };
 
     let path_separator = matches.value_of("path-separator").map(|str| str.to_owned());