americanize fox colors

js/constants/colors.js

@@ -0,0 +1,16 @@
+var head = {
+    brick: [0, 62, 53],
+    yellow: [48, 100, 64]
+}
+var bg = {
+    forest:     '#006375',
+    green:      '#63D6A3',
+    blue:       '#358EFF',
+    salmon:     '#FF9B7A',
+    coral:      '#F96854',
+}
+
+module.exports = {
+    head: head,
+    bg: bg
+};

js/fox.js

@@ -1,4 +1,5 @@
 const Chance = require('chance');
+const colors = require('./constants/colors.js');
 
 const hsl = function (h, s, l) {
   return "hsl(" + h + "," + s + "%, " + l + "%)";
@@ -14,15 +15,22 @@ const Fox = function (IMG_WIDTH, IMG_HEIGHT, seed) {
   // origin: head top left corner
   const kappa = chance.floating({min: 0.2, max: 0.45})
 
-  const hue = chance.integer({min: 5, max: 50});
-  const saturation = chance.integer({min: 70, max: 90});
-  const lightness = chance.integer({min: 40, max: 60});
+  const headColor = (function () {
+      const level = chance.floating({min: 0, max: 1});
+      const result = [];
+      const min = colors.head.brick;
+      const max = colors.head.yellow;
+      for (let i=0; i<min.length; i++) {
+          result.push(min[i] + (max[i] - min[i]) * level)
+      }
+      return hsl.apply(null, result)
+  }) ()
 
   const head = {
     width: 0.6 * IMG_WIDTH,
     height: 0.6 * IMG_HEIGHT,
     kappa: kappa,
-    color: hsl(hue, saturation, lightness)
+    color: headColor,
   }
 
   const origin = {x: IMG_WIDTH / 2 - head.width / 2, y: 0.5 * IMG_HEIGHT - head.height / 2};
@@ -98,11 +106,7 @@ const Fox = function (IMG_WIDTH, IMG_HEIGHT, seed) {
     canvas: {
       height: IMG_HEIGHT,
       width: IMG_WIDTH,
-      color: hsl(
-        chance.integer({min:0, max:360}),
-        chance.integer({min:0, max:100}),
-        chance.integer({min:10, max:100})
-      ),
+      color: chance.pickone(Object.keys(colors.bg).map(function (key) {return colors.bg[key];}))
     },
     head: head,
     ears: ears,