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ansi-styles

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ANSI escape codes for styling strings in the terminal

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

Install

$ npm install --save ansi-styles

Usage

const style = require('ansi-styles');
 
console.log(`${style.green.open}Hello world!${style.green.close}`);
 
 
// 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);

API

Each style has an open and close property.

Styles

Modifiers

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

Colors

  • black
  • red
  • green
  • yellow
  • blue
  • magenta
  • cyan
  • white
  • gray

Background colors

  • bgBlack
  • bgRed
  • bgGreen
  • bgYellow
  • bgBlue
  • bgMagenta
  • bgCyan
  • bgWhite

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
Example
console.log(style.color.green.open);

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 

Related

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

License

MIT © Sindre Sorhus