diff --git a/src/js/model/Frame.js b/src/js/model/Frame.js
index 51958fa7..bc327ba9 100644
--- a/src/js/model/Frame.js
+++ b/src/js/model/Frame.js
@@ -14,28 +14,57 @@
     }
   };
 
-  ns.Frame.fromPixelGrid = function (pixels) {
-    if (pixels.length && pixels[0].length) {
-      var w = pixels.length;
-      var h = pixels[0].length;
+  ns.Frame.fromPixelGrid = function (pixels, width, height) {
+    if (pixels.length) {
+      if (pixels[0].length) {
+        var w = pixels.length;
+        var h = pixels[0].length;
+        var buffer = [];
+        for (var y = 0; y < h; y++) {
+          for (var x = 0; x < w; x++ ) {
+            if (typeof pixels[x][y] == 'string') {
+              buffer[y * w + x] = pskl.utils.colorToInt(pixels[x][y]);
+            } else {
+              buffer[y * w + x] = pixels[x][y];
+            }
+          }
+        }
+      } else if (width && height) {
+        var w = width;
+        var h = height;
+        buffer = pixels;
+      } else {
+        throw 'Bad arguments in pskl.model.frame.fromPixelGrid, missing width and height';
+      }
+      
       var frame = new pskl.model.Frame(w, h);
-      frame.setPixels(pixels);
+      frame.setPixels(buffer);
       return frame;
     } else {
-      throw 'Bad arguments in pskl.model.Frame.fromPixelGrid : ' + pixels;
+      console.error(pixels);
+      throw 'Bad arguments in pskl.model.Frame.fromPixelGrid';
     }
   };
 
+  var _emptyPixelGridCache = {};
   ns.Frame.createEmptyPixelGrid_ = function (width, height) {
-    var pixels = [];
-    for (var columnIndex = 0 ; columnIndex < width ; columnIndex++) {
-      var columnArray = [];
-      for (var heightIndex = 0 ; heightIndex < height ; heightIndex++) {
-        columnArray.push(Constants.TRANSPARENT_COLOR);
+    var pixels;
+    var key = width+"-"+height;
+    if (_emptyPixelGridCache[key]) {
+      pixels = _emptyPixelGridCache[key];
+    } else {
+      pixels = _emptyPixelGridCache[key] = new Uint32Array(width * height);
+      var transparentColorInt = pskl.utils.colorToInt(Constants.TRANSPARENT_COLOR);
+      if (!pixels.fill) { // PhantomJS ='(
+        for (var i = 0; i < width * height; i++) {
+          pixels[i] = transparentColorInt;
+        }
+      } else {
+        pixels.fill(transparentColorInt);
       }
-      pixels[columnIndex] = columnArray;
     }
-    return pixels;
+
+    return new Uint32Array(pixels);
   };
 
   ns.Frame.createEmptyFromFrame = function (frame) {
@@ -44,7 +73,7 @@
 
   ns.Frame.prototype.clone = function () {
     var clone = new ns.Frame(this.width, this.height);
-    clone.setPixels(this.getPixels());
+    clone.setPixels(this.pixels);
     return clone;
   };
 
@@ -64,8 +93,9 @@
   };
 
   ns.Frame.prototype.clear = function () {
-    var pixels = ns.Frame.createEmptyPixelGrid_(this.getWidth(), this.getHeight());
-    this.setPixels(pixels);
+    this.pixels = ns.Frame.createEmptyPixelGrid_(this.getWidth(), this.getHeight());
+    this.version++;
+    // this.setPixels(pixels);
   };
 
   /**
@@ -73,11 +103,10 @@
    * @private
    */
   ns.Frame.prototype.clonePixels_ = function (pixels) {
-    var clonedPixels = [];
-    for (var col = 0 ; col < pixels.length ; col++) {
-      clonedPixels[col] = pixels[col].slice(0 , pixels[col].length);
-    }
-    return clonedPixels;
+    //npixels = new Uint32Array(pixels.length);
+    //npixels.set(pixels);
+
+    return new Uint32Array(pixels);
   };
 
   ns.Frame.prototype.getHash = function () {
@@ -86,9 +115,14 @@
 
   ns.Frame.prototype.setPixel = function (x, y, color) {
     if (this.containsPixel(x, y)) {
-      var p = this.pixels[x][y];
+      var index = y * this.width + x;
+      var p = this.pixels[index];
+      if (typeof color === 'string') {
+        color = pskl.utils.colorToInt(color);
+      } 
+      
       if (p !== color) {
-        this.pixels[x][y] = color || Constants.TRANSPARENT_COLOR;
+        this.pixels[index] = color || pskl.utils.colorToInt(Constants.TRANSPARENT_COLOR);
         this.version++;
       }
     }
@@ -96,7 +130,7 @@
 
   ns.Frame.prototype.getPixel = function (x, y) {
     if (this.containsPixel(x, y)) {
-      return this.pixels[x][y];
+      return this.pixels[y * this.width + x];
     } else {
       return null;
     }
@@ -107,7 +141,7 @@
     var height = this.getHeight();
     for (var x = 0 ; x < width ; x++) {
       for (var y = 0 ; y < height ; y++) {
-        callback(this.pixels[x][y], x, y, this);
+        callback(this.pixels[y * this.width + x], x, y, this);
       }
     }
   };
diff --git a/src/js/rendering/FramesheetRenderer.js b/src/js/rendering/FramesheetRenderer.js
index 2e325e17..6f36f361 100644
--- a/src/js/rendering/FramesheetRenderer.js
+++ b/src/js/rendering/FramesheetRenderer.js
@@ -30,12 +30,11 @@
 
   ns.FramesheetRenderer.prototype.drawFrameInCanvas_ = function (frame, canvas, offsetWidth, offsetHeight) {
     var context = canvas.getContext('2d');
-    frame.forEachPixel(function (color, x, y) {
-      if (color != Constants.TRANSPARENT_COLOR) {
-        context.fillStyle = color;
-        context.fillRect(x + offsetWidth, y + offsetHeight, 1, 1);
-      }
-    });
+    var imageData = context.createImageData(frame.getWidth(), frame.getHeight());
+    var pixels = frame.getPixels();
+    var data = new Uint8ClampedArray(pixels.buffer);
+    imageData.data.set(data);
+    context.putImageData(imageData, offsetWidth, offsetHeight);
   };
 
   ns.FramesheetRenderer.prototype.createCanvas_ = function (columns, rows) {
diff --git a/src/js/tools/drawing/ColorSwap.js b/src/js/tools/drawing/ColorSwap.js
index 42c648c9..20184500 100644
--- a/src/js/tools/drawing/ColorSwap.js
+++ b/src/js/tools/drawing/ColorSwap.js
@@ -56,10 +56,9 @@
   };
 
   ns.ColorSwap.prototype.applyToolOnFrame_ = function (frame, oldColor, newColor) {
-    oldColor = oldColor.toUpperCase();
     frame.forEachPixel(function (color, col, row) {
-      if (color && color.toUpperCase() == oldColor) {
-        frame.pixels[col][row] = newColor;
+      if (color && color == oldColor) {
+        frame.setPixel(col, row, newColor);
       }
     });
     frame.version++;
diff --git a/src/js/tools/drawing/Lighten.js b/src/js/tools/drawing/Lighten.js
index 2ad6e3c3..3af0f062 100644
--- a/src/js/tools/drawing/Lighten.js
+++ b/src/js/tools/drawing/Lighten.js
@@ -43,10 +43,10 @@
     var overlayColor = overlay.getPixel(col, row);
     var frameColor = frame.getPixel(col, row);
 
-    var isPixelModified = overlayColor !== Constants.TRANSPARENT_COLOR;
+    var isPixelModified = overlayColor !== pskl.utils.colorToInt(Constants.TRANSPARENT_COLOR);
     var pixelColor = isPixelModified ? overlayColor : frameColor;
 
-    var isTransparent = pixelColor === Constants.TRANSPARENT_COLOR;
+    var isTransparent = pixelColor === pskl.utils.colorToInt(Constants.TRANSPARENT_COLOR);
     if (isTransparent) {
       return Constants.TRANSPARENT_COLOR;
     }
@@ -61,9 +61,9 @@
 
     var color;
     if (isDarken) {
-      color = window.tinycolor.darken(pixelColor, step);
+      color = window.tinycolor.darken(pskl.utils.intToColor(pixelColor), step);
     } else {
-      color = window.tinycolor.lighten(pixelColor, step);
+      color = window.tinycolor.lighten(pskl.utils.intToColor(pixelColor), step);
     }
 
     // Convert tinycolor color to string format.
diff --git a/src/js/tools/transform/TransformUtils.js b/src/js/tools/transform/TransformUtils.js
index 042b58e0..28c002c0 100644
--- a/src/js/tools/transform/TransformUtils.js
+++ b/src/js/tools/transform/TransformUtils.js
@@ -15,7 +15,7 @@
         } else if (axis === ns.TransformUtils.HORIZONTAL) {
           y = h - y - 1;
         }
-        frame.pixels[x][y] = color;
+        frame.setPixel(x, y, color);
       });
       frame.version++;
       return frame;
@@ -55,9 +55,9 @@
         x = x - xDelta;
         y = y - yDelta;
         if (clone.containsPixel(x, y)) {
-          frame.pixels[_x][_y] = clone.getPixel(x, y);
+          frame.setPixel(_x, _y, clone.getPixel(x, y));
         } else {
-          frame.pixels[_x][_y] = Constants.TRANSPARENT_COLOR;
+          frame.setPixel(_x, _y, Constants.TRANSPARENT_COLOR);
         }
       });
       frame.version++;
@@ -70,8 +70,9 @@
       var miny = frame.height;
       var maxx = 0;
       var maxy = 0;
+      var transparentColorInt = pskl.utils.colorToInt(Constants.TRANSPARENT_COLOR);
       frame.forEachPixel(function (color, x, y) {
-        if (color !== Constants.TRANSPARENT_COLOR) {
+        if (color !== transparentColorInt) {
           minx = Math.min(minx, x);
           maxx = Math.max(maxx, x);
           miny = Math.min(miny, y);
@@ -98,9 +99,9 @@
         y -= dy;
 
         if (clone.containsPixel(x, y)) {
-          frame.pixels[_x][_y] = clone.getPixel(x, y);
+          frame.setPixel(_x, _y, clone.getPixel(x, y));
         } else {
-          frame.pixels[_x][_y] = Constants.TRANSPARENT_COLOR;
+          frame.setPixel(_x, _y, Constants.TRANSPARENT_COLOR);
         }
       });
       frame.version++;
diff --git a/src/js/utils/FrameUtils.js b/src/js/utils/FrameUtils.js
index bc5d97b2..af2c74e8 100644
--- a/src/js/utils/FrameUtils.js
+++ b/src/js/utils/FrameUtils.js
@@ -1,6 +1,8 @@
 (function () {
   var ns = $.namespace('pskl.utils');
   var colorCache = {};
+  var offCanvasPool = {};
+  var imageDataPool = {};
   ns.FrameUtils = {
     /**
      * Render a Frame object as an image.
@@ -28,7 +30,12 @@
      * @param {String} globalAlpha (optional) global frame opacity
      */
     drawToCanvas : function (frame, canvas, transparentColor, globalAlpha) {
-      var context = canvas.getContext('2d');
+      var context;
+      if (canvas.context) {
+        context = canvas.context;
+      } else {
+        context = canvas.context = canvas.getContext('2d');
+      }
       globalAlpha = isNaN(globalAlpha) ? 1 : globalAlpha;
       context.globalAlpha = globalAlpha;
       transparentColor = transparentColor || Constants.TRANSPARENT_COLOR;
@@ -37,26 +44,49 @@
         context.fillRect(transparentColor, 0, 0, frame.getWidth(), frame.getHeight());
         context.drawImage(frame.getRenderedFrame(), 0, 0);
       } else {
-        for (var x = 0, width = frame.getWidth() ; x < width ; x++) {
-          for (var y = 0, height = frame.getHeight() ; y < height ; y++) {
-            var color = frame.getPixel(x, y);
+        var w = frame.getWidth();
+        var h = frame.getHeight();
+        var pixels = frame.pixels;
 
-            // accumulate all the pixels of the same color to speed up rendering
-            // by reducting fillRect calls
-            var w = 1;
-            while (color === frame.getPixel(x, y + w) && (y + w) < height) {
-              w++;
+        // Replace transparent color
+        var constantTransparentColorInt = pskl.utils.colorToInt(Constants.TRANSPARENT_COLOR);
+        var transparentColorInt = pskl.utils.colorToInt(transparentColor);
+        if (transparentColorInt != constantTransparentColorInt) {
+          pixels = frame.getPixels();
+          for (var i = 0; i < pixels.length; i++) {
+            if (pixels[i] == constantTransparentColorInt) {
+              pixels[i] = transparentColorInt;
             }
-
-            if (color == Constants.TRANSPARENT_COLOR) {
-              color = transparentColor;
-            }
-
-            pskl.utils.FrameUtils.renderLine_(color, x, y, w, context);
-            y = y + w - 1;
           }
         }
 
+        // Imagedata from cache
+        var imageDataKey = w+"-"+h;
+        var imageData;
+        if (!imageDataPool[imageDataKey]) {
+          imageData = imageDataPool[imageDataKey] = context.createImageData(w, h);
+        } else {
+          imageData = imageDataPool[imageDataKey];
+        }
+
+        // Convert to uint8 and set the data
+        var data = new Uint8ClampedArray(pixels.buffer);
+        var imgDataData = imageData.data;
+        imgDataData.set(data);
+
+        // Offcanvas from cache
+        var offCanvasKey = w+"-"+h;
+        var offCanvas;
+        if (!offCanvasPool[offCanvasKey]) {
+          offCanvas = offCanvasPool[offCanvasKey] = pskl.utils.CanvasUtils.createCanvas(w, h);
+          offCanvas.context = offCanvas.getContext('2d');
+        } else {
+          offCanvas = offCanvasPool[offCanvasKey];
+        }
+
+        // Put pixel data to offcanvas and draw the offcanvas onto the canvas
+        offCanvas.context.putImageData(imageData, 0, 0);
+        context.drawImage(offCanvas, 0, 0, w, h);
         context.globalAlpha = 1;
       }
     },
@@ -90,8 +120,9 @@
     },
 
     mergeFrames_ : function (frameA, frameB) {
+      var transparentColorInt = pskl.utils.colorToInt(Constants.TRANSPARENT_COLOR);
       frameB.forEachPixel(function (color, col, row) {
-        if (color != Constants.TRANSPARENT_COLOR) {
+        if (color != transparentColorInt) {
           frameA.setPixel(col, row, color);
         }
       });
diff --git a/src/js/utils/core.js b/src/js/utils/core.js
index 7525d013..56a71d2d 100644
--- a/src/js/utils/core.js
+++ b/src/js/utils/core.js
@@ -91,13 +91,12 @@ if (!Function.prototype.bind) {
   };
 
   ns.hashCode = function(str) {
-    var hash = 0;
-    if (str.length !== 0) {
-      for (var i = 0, l = str.length; i < l; i++) {
-        var chr = str.charCodeAt(i);
-        hash  = ((hash << 5) - hash) + chr;
+    var hash = 0, i, chr, len;
+    if (str.length === 0) return hash;
+    for (i = 0, len = str.length; i < len; i++) {
+        chr   = str.charCodeAt(i);
+        hash  = hash * 31 + chr;
         hash |= 0; // Convert to 32bit integer
-      }
     }
     return hash;
   };
@@ -120,6 +119,89 @@ if (!Function.prototype.bind) {
     });
   };
 
+  var colorCache = {};
+  ns.colorToInt = function (color) {
+    if (typeof color === 'number') {
+      return color;
+    }
+
+    if (typeof colorCache[color] !== 'undefined') {
+      return colorCache[color];
+    }
+
+    var intValue = 0;
+
+    // Hexadecimal
+    if ((color.length == 9 || color.length == 7 || color.length == 3) && color[0] == '#') {
+        var hex = parseInt(color.substr(1), 16);
+        if (color.length == 9) {
+          r = hex >> 24 & 0xff;
+          g = hex >> 16 & 0xff;
+          b = hex >> 8 & 0xff;
+          a = hex & 0xff;
+        } else if (color.length == 7) {
+          r = hex >> 16 & 0xff;
+          g = hex >> 8 & 0xff;
+          b = hex & 0xff;
+          a = 255;
+        } else {
+          r = hex >> 8 & 0xf * 16;
+          g = hex >> 4 & 0xf * 16;
+          b = hex & 0xf * 16;
+          a = 255;
+        }
+    } else if (color.length > 5 && color.substr(0, 5) == 'rgba(') { // RGBA
+      var rgba = color.substr(5).slice(0, -1).split(',');
+      r = parseInt(rgba[0]);
+      g = parseInt(rgba[1]);
+      b = parseInt(rgba[2]);
+      a = Math.floor(parseFloat(rgba[3]) * 255);
+    } else if (color.length > 4 && color.substr(0, 4) == 'rgb(') { // RGB
+      var rgb = color.substr(4).slice(0, -1).split(',');
+      r = parseInt(rgb[0]);
+      g = parseInt(rgb[1]);
+      b = parseInt(rgb[2]);
+    } else { // NO HOPE
+      // Determine color by using the browser itself
+      d = document.createElement("div");
+      d.style.color = color;
+      document.body.appendChild(d);
+
+      // Color in RGB 
+      color = window.getComputedStyle(d).color;
+      document.body.removeChild(d);
+
+      return pskl.utils.colorToInt(color);
+    }
+
+    intValue = (a << 24 >>> 0) + (b << 16) + (g << 8) + r;
+
+    colorCache[color] = intValue;
+    colorCacheReverse[intValue] = color;
+    return intValue;
+  };
+
+  var colorCacheReverse = {};
+  ns.intToColor = function(intValue) {
+    if (typeof colorCache[color] !== 'undefined') {
+      return colorCache[color];
+    }
+
+    if (typeof colorCacheReverse[intValue] !== 'undefined') {
+      return colorCacheReverse[intValue];
+    }
+
+    var r = intValue & 0xff;
+    var g = intValue >> 8 & 0xff;
+    var b = intValue >> 16 & 0xff;
+    var a = (intValue >> 24 >>> 0 & 0xff) / 255;
+    var color = 'rgba('+r+','+g+','+b+','+a+')';
+
+    colorCache[color] = intValue;
+    colorCacheReverse[intValue] = color;
+    return color;
+  };
+
   var reEntityMap = {};
   ns.unescapeHtml = function (string) {
     Object.keys(entityMap).forEach(function(key) {
diff --git a/src/js/utils/serialization/Deserializer.js b/src/js/utils/serialization/Deserializer.js
index 01db4abe..e02320a0 100644
--- a/src/js/utils/serialization/Deserializer.js
+++ b/src/js/utils/serialization/Deserializer.js
@@ -60,10 +60,12 @@
   };
 
   ns.Deserializer.prototype.loadExpandedLayer = function (layerData, index) {
+    var width = this.piskel_.getWidth();
+    var height = this.piskel_.getHeight();
     var layer = new pskl.model.Layer(layerData.name);
     layer.setOpacity(layerData.opacity);
     var frames = layerData.grids.map(function (grid) {
-      return pskl.model.Frame.fromPixelGrid(grid);
+      return pskl.model.Frame.fromPixelGrid(grid, width, height);
     });
     this.addFramesToLayer(frames, layer, index);
     return layer;
diff --git a/src/js/utils/serialization/Serializer.js b/src/js/utils/serialization/Serializer.js
index b946ad8e..9666fa06 100644
--- a/src/js/utils/serialization/Serializer.js
+++ b/src/js/utils/serialization/Serializer.js
@@ -28,7 +28,7 @@
         frameCount : frames.length
       };
       if (expanded) {
-        layerToSerialize.grids = frames.map(function (f) {return f.pixels;});
+        layerToSerialize.grids = frames.map(function (f) {return Array.prototype.slice.call(f.pixels);});
         return layerToSerialize;
       } else {
         var renderer = new pskl.rendering.FramesheetRenderer(frames);
diff --git a/src/js/worker/framecolors/FrameColors.js b/src/js/worker/framecolors/FrameColors.js
index ea4eb15c..fbf9fcbd 100644
--- a/src/js/worker/framecolors/FrameColors.js
+++ b/src/js/worker/framecolors/FrameColors.js
@@ -2,7 +2,7 @@
   var ns = $.namespace('pskl.worker.framecolors');
 
   ns.FrameColors = function (frame, onSuccess, onStep, onError) {
-    this.serializedFrame = JSON.stringify(frame.pixels);
+    this.pixels = frame.pixels;
 
     this.onStep = onStep;
     this.onSuccess = onSuccess;
@@ -13,9 +13,7 @@
   };
 
   ns.FrameColors.prototype.process = function () {
-    this.worker.postMessage({
-      serializedFrame : this.serializedFrame
-    });
+    this.worker.postMessage(this.pixels);
   };
 
   ns.FrameColors.prototype.onWorkerMessage = function (event) {
diff --git a/src/js/worker/framecolors/FrameColorsWorker.js b/src/js/worker/framecolors/FrameColorsWorker.js
index 65a87a2d..33a80006 100644
--- a/src/js/worker/framecolors/FrameColorsWorker.js
+++ b/src/js/worker/framecolors/FrameColorsWorker.js
@@ -1,6 +1,6 @@
 (function () {
   var ns = $.namespace('pskl.worker.framecolors');
-
+  
   if (Constants.TRANSPARENT_COLOR !== 'rgba(0, 0, 0, 0)') {
     throw 'Constants.TRANSPARENT_COLOR, please update FrameColorsWorker';
   }
@@ -36,10 +36,11 @@
 
     var getFrameColors = function (frame) {
       var frameColors = {};
-      for (var x = 0 ; x < frame.length ; x++) {
-        for (var y = 0 ; y < frame[x].length ; y++) {
-          var color = frame[x][y];
-          var hexColor = toHexString_(color);
+      var transparentColorInt = 0; // TODO: Fix magic number
+      for (var i = 0; i < frame.length; i++) {
+        var color = frame[i];
+        if (color !== transparentColorInt) {
+          var hexColor = rgbToHex(color & 0xff, color >> 16 & 0xff, color >> 8 & 0xff);
           frameColors[hexColor] = true;
         }
       }
@@ -48,8 +49,7 @@
 
     this.onmessage = function(event) {
       try {
-        var data = event.data;
-        var frame = JSON.parse(data.serializedFrame);
+        var frame = event.data;
         var colors = getFrameColors(frame);
         this.postMessage({
           type : 'SUCCESS',
diff --git a/test/js/rendering/CanvasRendererTest.js b/test/js/rendering/CanvasRendererTest.js
index a4a04e62..31183ad8 100644
--- a/test/js/rendering/CanvasRendererTest.js
+++ b/test/js/rendering/CanvasRendererTest.js
@@ -18,9 +18,9 @@ describe("Canvas Renderer test", function() {
 
     var frameFromCanvas = pskl.utils.FrameUtils.createFromImage(canvas);
 
-    expect(frameFromCanvas.getPixel(0,0)).toBe(BLACK);
-    expect(frameFromCanvas.getPixel(0,1)).toBe(WHITE);
-    expect(frameFromCanvas.getPixel(1,0)).toBe(WHITE);
-    expect(frameFromCanvas.getPixel(1,1)).toBe(BLACK);
+    test.testutils.colorEqualsColor(frameFromCanvas.getPixel(0,0), BLACK);
+    test.testutils.colorEqualsColor(frameFromCanvas.getPixel(0,1), WHITE);
+    test.testutils.colorEqualsColor(frameFromCanvas.getPixel(1,0), WHITE);
+    test.testutils.colorEqualsColor(frameFromCanvas.getPixel(1,1), BLACK);
   });
 });
\ No newline at end of file
diff --git a/test/js/selection/SelectionManagerTest.js b/test/js/selection/SelectionManagerTest.js
index 44b20c39..88cb5dbc 100644
--- a/test/js/selection/SelectionManagerTest.js
+++ b/test/js/selection/SelectionManagerTest.js
@@ -198,7 +198,7 @@ describe("SelectionManager suite", function() {
 
   var checkContainsPixel = function (pixels, row, col, color) {
     var containsPixel = pixels.some(function (pixel) {
-      return pixel.row == row && pixel.col == col && pixel.color == color;
+      return pixel.row == row && pixel.col == col && test.testutils.compareColor(pixel.color, color);
     });
     expect(containsPixel).toBe(true);
   };
diff --git a/test/js/testutils/TestUtils.js b/test/js/testutils/TestUtils.js
index 156f2be6..c7ae05b6 100644
--- a/test/js/testutils/TestUtils.js
+++ b/test/js/testutils/TestUtils.js
@@ -38,7 +38,7 @@
 
   ns.frameEqualsGrid = function (frame, grid) {
     frame.forEachPixel(function (color, col, row) {
-      expect(color).toBe(grid[row][col]);
+      ns.colorEqualsColor(color, grid[row][col]);
     });
   };
 
@@ -47,10 +47,18 @@
       for (var y = 0 ; y < grid[x].length ; y++) {
         var expected = tinycolor(grid[x][y]).toRgbString();
         var color = tinycolor(ns.getRgbaAt(image, x, y)).toRgbString();
-        expect(color).toBe(expected);
+        ns.colorEqualsColor(color, expected);
       }
     }
-  }
+  };
+
+  ns.compareColor = function(colorA, colorB) {
+    return pskl.utils.colorToInt(colorA) === pskl.utils.colorToInt(colorB);
+  };
+
+  ns.colorEqualsColor = function (color, expected) {
+    expect(pskl.utils.colorToInt(color)).toBe(pskl.utils.colorToInt(expected));
+  };
 
   ns.getRgbaAt = function (image, x, y) {
     var w = image.width;