title: Magento product attribute quantities
body: <p>In Magento (1.7.0.2) If i have a product, e.g. iPod and I add a custom attribute to this product e.g. colour, (red, blue, green), can I define the quantity of stock that is availble for each colour? </p>
  
  <p>E.g. 10 red, 1 blue and 3 green, as opposed to 14 iPods?</p>
  
  <p>Thanks</p>