Merge pull request mdn#134 from hanche/fix-hwb

Fixed incorrect conversion to HWB

Author: teoli2003

modules/colors.html

@@ -189,9 +189,9 @@
 
       function createHWB(h, s, l, opacity) {
         const cell = document.querySelector("#HWB td");
-        const hsv = (s * ((l < 50) ? l : 100 - l)) / 100;
-        let W = (hsv === 0) ? 0 : ((2 * hsv) / (l + hsv)) * 100;
-        let B = l + hsv;
+        const chroma = s * (1 - Math.abs(l/50 - 1));
+        let W = l - chroma / 2;
+        let B = 100 - l - chroma / 2;
         W = W.toFixed(1);
         B = B.toFixed(1);
         if (opacity === 1) {