feature: vor und nachteile

praesentation/node_modules/khroma/dist/methods/luminance.js

@@ -0,0 +1,12 @@
+/* IMPORT */
+import _ from '../utils/index.js';
+import Color from '../color/index.js';
+/* MAIN */
+//SOURCE: https://planetcalc.com/7779
+const luminance = (color) => {
+    const { r, g, b } = Color.parse(color);
+    const luminance = .2126 * _.channel.toLinear(r) + .7152 * _.channel.toLinear(g) + .0722 * _.channel.toLinear(b);
+    return _.lang.round(luminance);
+};
+/* EXPORT */
+export default luminance;