This is a TEST product to show you how it will look like if you use Custom Field: Generic Child Variant. In this DEMO, Diesel Sweater is parent product and all others are child products. Black, Grey and Mahogany colors have stock, and Navy/Blue is Out of Stock. The parent product is set "not orderable", so "Choose a product variant first" text shows off instead of "add to cart" button. Also notice that, the product pictures are changed based on color selection.