use std::time::SystemTime; use fern::colors::{Color, ColoredLevelConfig}; use log::{debug, error, warn}; fn main() { let colors = ColoredLevelConfig::new().debug(Color::Magenta); fern::Dispatch::new() .chain(std::io::stdout()) .format(move |out, message, record| { out.finish(format_args!( "[{} {} {}] {}", humantime::format_rfc3339_seconds(SystemTime::now()), // This will color the log level only, not the whole line. Just a touch. colors.color(record.level()), record.target(), message )) }) .apply() .unwrap(); error!("hi"); debug!("sup"); warn!("oh"); }