Pilsner Urqell makes its own malt. The darker golden hue can't just come from decoction and hot-side aeration, and historically we know that old pilsner malts were probably closer to something like a darker Maris Otter than they are to modern pilsner malts. Therefore, I use a mixture of light and dark Bohemian Pilsner malt. The dark pilsner malt is like a light munich and I think it is essential in this style. I think this is the key, along with decoction and the correct yeast and good pitching rate, to get the right colour and body. Decoction is a SINGLE decoction, but take 75% of all solid grain (very little liquid) and boil for 45 minutes to 1 hour (yes, really!) in something with a very thick bottom so it doesn't burn.