get dominant, chroma, achroma, and point colors in photo, with some data of colors.
You should install latest version of dependencies, chroma, drawing-kit, histogram-analyze.
<body>
...
<script src="path/to/chroma.js"></script>
<script src="path/to/drawing-kit.js"></script>
<script src="path/to/histogram-analyze.js"></script>
<script src="path/to/rothko.js"></script>
<script src="your/script/file"></script>
</body>
var img = new Image();
img.src = "path/to/image"
var roth = Rothko(img);
img.onload = function () {
var colors = roth.getColorsSync();
console.log(colors.dominants,
colors.points,
colors.chromas,
colors.achromas);
}