Determine if the given color is light or dark.
This is useful for dynamically deciding which color a foreground color should be when placed over a given background color.
npm install contrast --save
var contrast = require('contrast');
var el = document.querySelector('#some-element');
var bgColor = el.style.backgroundColor;
var textColor;
if (contrast(bgColor) === 'light') {
textColor = '#000';
}
else {
textColor = '#fff';
}
el.style.color = textColor;npm install
npm test