How to change node.js's console font color?
I had to change the console background color to white because of eye problems, but the font is gray colored and it makes the messages unreadable. How can I change it?
Below you can find colors reference of text to command when running node.js application:
console.log('x1b[36m%sx1b[0m', 'I am cyan'); //cyan
console.log('x1b[33m%sx1b[0m', stringToMakeYellow); //yellow
Note %s
is where in the string (the second argument) gets injected. x1b[0m
resets the terminal color so it doesn't continue to be the chosen color anymore after this point.
Colors reference
Reset = "x1b[0m"
Bright = "x1b[1m"
Dim = "x1b[2m"
Underscore = "x1b[4m"
Blink = "x1b[5m"
Reverse = "x1b[7m"
Hidden = "x1b[8m"
FgBlack = "x1b[30m"
FgRed = "x1b[31m"
FgGreen = "x1b[32m"
FgYellow = "x1b[33m"
FgBlue = "x1b[34m"
FgMagenta = "x1b[35m"
FgCyan = "x1b[36m"
FgWhite = "x1b[37m"
BgBlack = "x1b[40m"
BgRed = "x1b[41m"
BgGreen = "x1b[42m"
BgYellow = "x1b[43m"
BgBlue = "x1b[44m"
BgMagenta = "x1b[45m"
BgCyan = "x1b[46m"
BgWhite = "x1b[47m"
EDIT:
For example, x1b[31m
is an escape sequence that will be intercepted by your terminal and instructs it to switch to the red color. In fact, x1b
is the code for the non-printable control character escape
. Escape sequences dealing only with colors and styles are also known as ANSI escape code and are standardized, so therefore they (should) work on any platform.
There are a few modules for changing console font color in Node.js the most popular are:
chalk usage:
npm install chalk
var chalk = require('chalk');
console.log(chalk.red('Text in red'));
colors usage:
npm install colors
var colors = require('colors/safe'); // does not alter string prototype
console.log(colors.red('This String Will Display RED'));
There are a few colors to chose from as well as text formatting like Bold and Italic.
Many people have noted their disapproval at Colors altering the String prototype , if you prefer your prototypes left alone, you will want to use cli-color or chalk
cli-color usage:
npm install cli-color
var clc = require('cli-color');
console.log(clc.red('Text in red'));
Both cli-color and chalk require a bit more typing but you get similar results (to colors) without String prototype additions. Both support a good range of colors, formatting (bold/italics etc.) and have unit tests .
Take your pick.
If you want to change the colors directly yourself without a module try
console.log('x1b[36m', 'sometext' ,'x1b[0m');
First 'x1b[36m' to change the colors to "36" and then back to terminal color "0".
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