Fix on particle color gradients

dist/preview release/babylon.max.js

@@ -55747,7 +55747,7 @@ var BABYLON;
             var colorGradient = new BABYLON.ColorGradient();
             colorGradient.gradient = gradient;
             colorGradient.color1 = color;
-            colorGradient.color2 = color;
+            colorGradient.color2 = color2;
             this._colorGradients.push(colorGradient);
             this._colorGradients.sort(function (a, b) {
                 if (a.gradient < b.gradient) {

dist/preview release/babylon.no-module.max.js

@@ -55714,7 +55714,7 @@ var BABYLON;
             var colorGradient = new BABYLON.ColorGradient();
             colorGradient.gradient = gradient;
             colorGradient.color1 = color;
-            colorGradient.color2 = color;
+            colorGradient.color2 = color2;
             this._colorGradients.push(colorGradient);
             this._colorGradients.sort(function (a, b) {
                 if (a.gradient < b.gradient) {

dist/preview release/es6.js

@@ -55714,7 +55714,7 @@ var BABYLON;
             var colorGradient = new BABYLON.ColorGradient();
             colorGradient.gradient = gradient;
             colorGradient.color1 = color;
-            colorGradient.color2 = color;
+            colorGradient.color2 = color2;
             this._colorGradients.push(colorGradient);
             this._colorGradients.sort(function (a, b) {
                 if (a.gradient < b.gradient) {

dist/preview release/viewer/babylon.viewer.max.js

@@ -55835,7 +55835,7 @@ var BABYLON;
             var colorGradient = new BABYLON.ColorGradient();
             colorGradient.gradient = gradient;
             colorGradient.color1 = color;
-            colorGradient.color2 = color;
+            colorGradient.color2 = color2;
             this._colorGradients.push(colorGradient);
             this._colorGradients.sort(function (a, b) {
                 if (a.gradient < b.gradient) {

src/Particles/babylon.particleSystem.ts

@@ -594,7 +594,7 @@
             let colorGradient = new ColorGradient();
             colorGradient.gradient = gradient;
             colorGradient.color1 = color;
-            colorGradient.color2 = color;
+            colorGradient.color2 = color2;
             this._colorGradients.push(colorGradient);
 
             this._colorGradients.sort((a, b) => {