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JavaScript: Convert the values of RGB components to a color code

JavaScript fundamental (ES6 Syntax): Exercise-252 with Solution

Write a JavaScript program to convert the values of RGB components to a color code.

  • Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (<<) and Number.prototype.toString(16).
  • Use String.prototype.padStart(6, '0') to get a 6-digit hexadecimal value.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const RGBToHex = (r, g, b) => ((r << 16) + (g << 8) + b).toString(16).padStart(6, '0');
console.log(RGBToHex(255, 165, 1));
console.log(RGBToHex(255, 255, 1));

Sample Output:

ffa501
ffff01

Pictorial Presentation:

JavaScript Fundamental: Convert the values of RGB components to a color code.
JavaScript Fundamental: Convert the values of RGB components to a color code.

Flowchart:

flowchart: Convert the values of RGB components to a color code.

Live Demo:

See the Pen javascript-basic-exercise-252-1 by w3resource (@w3resource) on CodePen.


Improve this sample solution and post your code through Disqus

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JavaScript: Tips of the Day

How to check whether a string contains a substring in JavaScript?

ECMAScript 6 introduced String.prototype.includes:

const string = "foo";
const substring = "oo";

console.log(string.includes(substring));

includes doesn't have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found:

var string = "foo";
var substring = "oo";

console.log(string.indexOf(substring) !== -1);

Ref: https://bit.ly/3fFFgZv