Some flutes come with yellow colored pads installed instead of the traditional white pads. There’s no difference between yellow and white pads other than the color. So instead of buying yellow pads, I just use McCormick’s yellow food coloring to stain my white pads yellow. It matches the pads pretty much perfectly right out of the bottle and you can dilute it with water to get exactly what you want if you’re picky. Simple, cheap, easy.