diff --git a/src/Chart.Doughnut.js b/src/Chart.Doughnut.js
index 4a4c9afb0..b3ab6ebfc 100644
--- a/src/Chart.Doughnut.js
+++ b/src/Chart.Doughnut.js
@@ -41,7 +41,7 @@
 		var h = (part / total) * 360,
 			s = 1,
 			v = 1,
-			c = h * s,
+			c = v * s,
 			x =  c * (1 - Math.abs((h / 60) % 2 - 1)),
 			m = v - c,
 			r,
@@ -55,29 +55,29 @@
 				b = 0 + m;
 			break;
 			case 1: // 60 <= h < 120
-				r = c + m;
-				g = x + m;
+				r = x + m;
+				g = c + m;
 				b = 0 + m;
 			break;
 			case 2: // 120 <= h < 180
-				r = c + m;
-				g = x + m;
-				b = 0 + m;
+				r = 0 + m;
+				g = c + m;
+				b = x + m;
 			break;
 			case 3: // 180 <= h < 240
-				r = c + m;
+				r = 0 + m;
 				g = x + m;
-				b = 0 + m;
+				b = c + m;
 			break;
 			case 4: // 240 <= h < 300
-				r = c + m;
-				g = x + m;
-				b = 0 + m;
+				r = x + m;
+				g = 0 + m;
+				b = c + m;
 			break;
 			case 5: // 300 <= h < 360
 				r = c + m;
-				g = x + m;
-				b = 0 + m;
+				g = 0 + m;
+				b = x + m;
 			break;
 		}
 
@@ -123,6 +123,13 @@
 			}
 			this.calculateTotal(data);
 
+			data = data.map(function (v, i, a){
+				if (!v.color) {
+					v.color = hue(i, a.length);
+					return v;
+				}
+			});
+
 			helpers.each(data,function(datapoint, index){
 				this.addData(datapoint, index, true);
 			},this);