hue colors standard error (and optionally standard output) for the command you provide.

You can customize hue's output colors with the environment variables HUEOUT and HUEERR. For example, HUEERR=bold will set standard error to bold, HUEOUT=blue will set standard output to blue, and HUEERR=redbg will give standard error a red background. Multiple attributes can be provided in a comma separated list; for example, HUEOUT=bold,green will make standard output both bold and green.

Power users can provide HUEOUT and HUEERR specific ANSI escape codes if they so desire.

curl lesiw.io/hue | sh

go install lesiw.io/hue@latest

By default, hue uses go-iomux, which is a Go port of io-mux, which is a Rust implementation of the technique in rederr. This has the benefit of preserving order between stdout and stderr at the small cost of using sockets for stdout and stderr.

In the rare instance where sockets do not perform as expected, HUEASYNC=1 will fall back to an approach without sockets, which will break message ordering.