Saffron is what will give the rice its golden hue and unique aroma. I purchase my saffron from Trader Joe's for a very reasonable price at $5.99 for a 0.02 ounce jar. It works well, but if you can't find saffron for a reasonable price I suggest using turmeric in its place. Turmeric is traditionally known as 'Indian Saffron' and will lend a subtle peppery, warm flavor and yellow hue. It's a great substitute for saffron when making paella.