How to convert decimal to hexadecimal in JavaScript

Question

How do you convert decimal values to their hexadecimal equivalent in JavaScript?

Answer 1

For anyone interested, here's a JSFiddle comparing most of the answers given to this question.

And here's the method I ended up going with:

function decToHex(dec) {
  return (dec + Math.pow(16, 6)).toString(16).substr(-6)
}

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Also, bear in mind that if you're looking to convert from decimal to hex for use in CSS as a color data type, you might instead prefer to extract the RGB values from the decimal and use rgb().

For example (JSFiddle):

let c = 4210330 // your color in decimal format
let rgb = [(c & 0xff0000) >> 16,  (c & 0x00ff00) >> 8,  (c & 0x0000ff)]

// Vanilla JS:
document..getElementById('some-element').style.color = 'rgb(' + rgb + ')'
// jQuery:
$('#some-element').css('color', 'rgb(' + rgb + ')')

This sets #some-element's CSS color property to rgb(64, 62, 154).