Chybné obarvení obrázku v canvas u chrome

var imgd = ctx[activeTurn].getImageData(0, 0, canvas[activeTurn].width, canvas[activeTurn].height);
   var pix = imgd.data;
   var uniqueColor = [rgb[0],rgb[1],rgb[2]];
   
   // Loops through all of the pixels and modifies the components.
   for (var i = 0, n = pix.length; i <n; i += 4) 
    {
      pix[i] = uniqueColor[0];   // Red component
      pix[i+1] = uniqueColor[1]; // Blue component
      pix[i+2] = uniqueColor[2]; // Green component
      //pix[i+3] = 255;
     }  
   ctx[activeTurn].putImageData(imgd, 0, 0);