Darken Color

Darken a hex color by a percentage.

Code

General

const num = parseInt(hex.replace('#', ''), 16);
const amt = Math.round(2.55 * percent);
const R = Math.max(0, (num >> 16) - amt);
const G = Math.max(0, ((num >> 8) & 0x00FF) - amt);
const B = Math.max(0, (num & 0x0000FF) - amt);
return '#' + [R, G, B].map(x => x.toString(16).padStart(2, '0')).join('');

Parameters

hex(string)

The hex color to darken

percent(number)

Percentage to darken (0-100)

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