Print() to Console Log with Color

Colors in JavaScript console

In Chrome & Firefox (+31) you can add CSS in console.log messages:

console.log('%c Oh my heavens! ', 'background: #222; color: #bada55');

print() to console log with color

Nowadays, Xcode debugging console doesn't support coloring.

How to apply colors to console.log when using multiple arguments?

You add text in first argument after %c using template literals

var text = "Hello World";var style = "background: #222; color: #bada55";console.log(`%c${text}`, style);

Format console.log with color and variables surrounding non-formatted text

In order to get console.log() to be formatted such that it allows formatted and unformatted text in the same line, you must "reset" the css that you changed following the formatted css. For example, for the log to show up formatted like the code below

<span style="background: #ffa600; color: #ffe4b3;">Array[index0]</span> = <span style="background: yellow; color: black; font-style: italic;">http://www.google.com</span>

How to change node.js's console font color?

Below you can find colors reference of text to command when running node.js application:

console.log('\x1b[36m%s\x1b[0m', 'I am cyan');  //cyan
console.log('\x1b[33m%s\x1b[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.

Wikipedia has a nice comparison of how different terminals display colors
https://en.wikipedia.org/wiki/ANSI_escape_code#Colors

How to print to console in color?

Define color like this:

W  = '\033[0m'  # white (normal)
R  = '\033[31m' # red
G  = '\033[32m' # green
O  = '\033[33m' # orange
B  = '\033[34m' # blue
P  = '\033[35m' # purple

print(R+"hello how are you"+W)

Demo:
Demo

see all color codes here:Color Codes

How to call print() with colorful text to android studio console in flutter

You need to print escape sequences to get the color effects in terminal output.

See also https://en.wikipedia.org/wiki/ANSI_escape_code

https://pub.dartlang.org/packages/ansicolor is a Dart package that makes this easy.