First, go to http://www.pixlr.com" onclick="window.open(this.href);return false;. Go to the Pixlr editor. Open up the pose you want to color.
Next, click 'Layer' at the top and click 'New Layer'.
Then, go to the layers box on the right and at the bottom of the box, there will be a small arrow. Click it.
Finally, change the mode to 'Multiply' and start coloring! I hope this helped!


*EDIT* This is soooo old... omg....