ANSI escape codes for styling strings in the terminal

ansi, styles, color, colour, colors, terminal, console, cli, string, tty, escape, formatting, rgb, 256, shell, xterm, log, logging, command-line, text, chalk
npm install ansi-styles@4.1.0


ansi-styles Build Status

ANSI escape codes for styling strings in the terminal

You probably want the higher-level chalk module for styling your strings.


$ npm install ansi-styles


const style = require('ansi-styles');

console.log(`${}Hello world!${}`);

// Color conversion between 16/256/truecolor
// NOTE: If conversion goes to 16 colors or 256 colors, the original color
//       may be degraded to fit that color palette. This means terminals
//       that do not support 16 million colors will best-match the
//       original color.
console.log(style.bgColor.ansi.hsl(120, 80, 72) + 'Hello world!' + style.bgColor.close);
console.log(style.color.ansi256.rgb(199, 20, 250) + 'Hello world!' + style.color.close);
console.log(style.color.ansi16m.hex('#abcdef') + 'Hello world!' + style.color.close);


Each style has an open and close property.



  • reset
  • bold
  • dim
  • italic (Not widely supported)
  • underline
  • inverse
  • hidden
  • strikethrough (Not widely supported)


  • black
  • red
  • green
  • yellow
  • blue
  • magenta
  • cyan
  • white
  • blackBright (alias: gray, grey)
  • redBright
  • greenBright
  • yellowBright
  • blueBright
  • magentaBright
  • cyanBright
  • whiteBright

Background colors

  • bgBlack
  • bgRed
  • bgGreen
  • bgYellow
  • bgBlue
  • bgMagenta
  • bgCyan
  • bgWhite
  • bgBlackBright (alias: bgGray, bgGrey)
  • bgRedBright
  • bgGreenBright
  • bgYellowBright
  • bgBlueBright
  • bgMagentaBright
  • bgCyanBright
  • bgWhiteBright

Advanced usage

By default, you get a map of styles, but the styles are also available as groups. They are non-enumerable so they don't show up unless you access them explicitly. This makes it easier to expose only a subset in a higher-level module.

  • style.modifier
  • style.color
  • style.bgColor

Raw escape codes (i.e. without the CSI escape prefix \u001B[ and render mode postfix m) are available under, which returns a Map with the open codes as keys and close codes as values.

//=> 39

256 / 16 million (TrueColor) support

ansi-styles uses the color-convert package to allow for converting between various colors and ANSI escapes, with support for 256 and 16 million colors.

To use these, call the associated conversion function with the intended output, for example:

style.color.ansi.rgb(100, 200, 15); // RGB to 16 color ansi foreground code
style.bgColor.ansi.rgb(100, 200, 15); // RGB to 16 color ansi background code

style.color.ansi256.hsl(120, 100, 60); // HSL to 256 color ansi foreground code
style.bgColor.ansi256.hsl(120, 100, 60); // HSL to 256 color ansi foreground code

style.color.ansi16m.hex('#C0FFEE'); // Hex (RGB) to 16 million color foreground code
style.bgColor.ansi16m.hex('#C0FFEE'); // Hex (RGB) to 16 million color background code


  • ansi-escapes - ANSI escape codes for manipulating the terminal


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