Remove the bowls of rice from the sheet pan, and cover the pan with parchment paper. Scoop one bowl of the colored rice onto the covered pan, and evenly distribute to create a layer of pretty rice. Rub the grains together with rubber-gloved hands to ensure grains are totally coated with color. Do the same on the other sheet pan with the blue rice.
Place the sheet pans in a 200˚F oven, and warm for one hour. This bakes the color into the rice so it won't come off on your hands or mix with the other colors of rice while assembling the patriotic candleholders.