image-average-color

A simple library that calculates the average color of a PNG, JPG or GIF image.

The only exported function takes two arguments: first is either Buffer with image contents or a filename, second one is a callback. Callback function should accept a possible error and a color in form of array of four values in range 0...255 representing red, green, blue and alpha channels.

const average = require('image-average-color');

average('image.png', (err, color) => {
  if (err) throw err;
  var [red, green, blue, alpha] = color;
});

loadImageFromAstral((err, data) => {
  if (err) throw err;

  average(data, (err, color) => {
    if (err) throw err;
    var [red, green, blue, alpha] = color;
  });
});

This package also provides a command-line utility called average-color that accepts a filename and prints the average color in CSS format:

$ average-color image.jpg
rgba(86, 219, 101, 1)