changed default pixel grid color to black

js/_pixelGrid.js

@@ -1,5 +1,5 @@
 // Start colour of the pixel grid (can be changed in the preferences)
-let pixelGridColor = "#0000FF";
+let pixelGridColor = "#000000";
 // Distance between one line and another in HTML pixels
 let lineDistance = 12;
 // The grid is not visible at the beginning

js/_settings.js

@@ -15,7 +15,7 @@ if(!settingsFromCookie) {
         enableEyedropperPreview: true, //unused - performance
         numberOfHistoryStates: 20,
         maxColorsOnImportedImage: 128,
-        pixelGridColour: '#0000FF'
+        pixelGridColour: '#000000'
     };
 }
 else{